Gems or the like (A44C17)

A   Human necessities(304962)
A44C17                 Gems or the like(100)
Polycrystalline synthetic jewelry material (versions) and method of its production // 2613520
FIELD: chemistry.SUBSTANCE: creating a polycrystalline jewelry material from coloured transparent or translucent oxide ceramics with dopants is proposed. The material consists of oxidic compounds which are represented by yttrium-aluminium garnet or magnesium aluminium spinel, for dying which ions of transition and rare earth metals: zinc, iron, vanadium, chromium, manganese, nickel, cobalt, titanium, neodymium, europium, terbium, ytterbium, holmium, erbium, thulium - are used. The method of manufacturing transparent or translucent ceramic comprises the stages of obtaining a powder mixture and annealing the components, hot uniaxial/cold isostatic pressing, hot isostatic pressing and heat treatment.EFFECT: wider colour range of samples and possibility of obtaining colour effects caused by the activator concentration variable as per the pattern or the crystalline phases are achieved, the cost of goods is much less in comparison with the use of single-crystal material.5 cl, 4 tbl, 2 ex
ethod for wire wrapping gemstones // 2610862
FIELD: jewelry.SUBSTANCE: invention relates to wire wrapping gemstones. Method for wire wrapping gemstones involves the following: hook is used to form a bowl-shaped wire frame fot the gemstone, whein its side parts and its face are partially wrapped and have a delicate weaving around them, then the stone is placed into the formed frame. Method uses a single uncut piece of wire to form the frame; row consisting of chain stitches is woven, when the required length is achieved, the row is locked to form a circle, thus completing the first row of the woven frame for the stone. Then, following the above procedure, the rest of the rows are woven along the circumference of the stone, the number of the rows being not more than five; a bowl-shaped frame is formed as a result, one end of the wire is on one side of it and the other end of the working wire is on the other side. Then the bowl-shaped frame is turned inside out and after that the gemstone is place inside the frame. Then the wire frame is tightly wrapped around the bottom and side parts of the gemstone, partially covering the face side of the gemstone, remaining end of the wire is cut off, then the cut end of the wire is pulled through the adjacent loop onto the reverse side, then it is used to form the delicate weaving, pulling another loop through the first loop using the hook. All the loops of the second or third row are lifted, starting from the face side the gemstone, bending the loops by 90 degrees, so that they are parallel to the surface, onto where the stone will be placed. Weaving to the center of the gemstone is performed at the reverse side of the gemstone by pulling the end of the wire in an opposite direction, catching the end loop of the first row and pulling it in the downward direction, then it is repeated for the same end of the wire, but from left to right and at the end of the wire a knot is made.EFFECT: simplified and faster process of weaving without seams and joints, as well as possibility to remove the wrapped stone.1 cl, 9 dwg

Gem stone frame fastening in stone // 2607776
FIELD: jewelry industry.SUBSTANCE: invention relates to jewelry industry. Carcass fastener comprises, at least, two parts, forming base with gluing. At least, one of base parts contains, at least, one recess, each of which is made with through hole, and in each of recesses jewel element is arranged, made in form of jewelery insert encase into metal, made with pin in jewelery element lower part. Pin is inserted into recess through hole and rigidly attached to fastening element from base part other side, made with lateral dimension, exceeding recess through hole diameter, which prevents jewelry element falling out of recess after attachment. At least, one of base parts is made with grooves and/or recesses on glued surface, in assembled state providing hidden arrangement of jewelry article base bearing frame elements inside them, as well as jewelry elements fasteners and pins.EFFECT: improved operational characteristics of jewelry article due to jewelry article increased fastening strength in base, with simultaneous provision of hidden from view base frame fastening with jewelry element in jewelry article.7 cl, 14 dwg

Obtained by chemical deposition from vapor phase monocrystalline synthetic diamond materials, which have uniform colour // 2595671
FIELD: technological processes.SUBSTANCE: invention relates to production of coloured diamonds, which can be used in optics and for jewelry purposes. Monocrystalline CVD-synthetic diamond material comprises multiple layers, which includes at least two groups of layers differ in their defects composition and colour, wherein type of defects, concentration of defects and thickness of layers for each of said at least two layers are such that if coloured monocrystalline CVD diamond material is processed into diamond with round brilliant cut, containing platform and culet and having depth from platform to culet of more than 1 mm, then diamond with round brilliant cut has uniform colour when viewed with naked eye of person in standard surrounding observation conditions in, at least, direction through platform to culet; said, at least, two groups of layers contain first group of layers containing alloying admixture of boron in concentration sufficient for producing blue colour, and second group of layers containing lower concentration of alloying admixture of boron, first group of layers contains not compensated dopant of boron in concentration of not less than 0.01 ppm and not more than 5.00 ppm, and second group of layers contains dopant of insulating replacement nitrogen in concentration of not less than 0.01 ppm and not more than 5 ppm, wherein visibility quality indicator (FM) of individual layers is not more than 0.15 and is calculated as product of: FM = thickness (mm) of layers for first set of layers × thickness (mm) layers for second set of layers × concentration (ppm) of solid-state boron in first group of layers × depth (mm) of round brilliant cut.EFFECT: invention enables to obtain uniform blue colour diamonds with high growth rate.14 cl, 6 dwg

ethod of increasing size of diamonds // 2585634
FIELD: chemistry.SUBSTANCE: invention relates to production of synthetic diamonds and can be used as nuclear radiation detectors in fast particle counters, as well as in jewelry. Method involves depositing carbon on seed crystals of diamonds during their heating in vacuum, seed crystals pre-fixed on surface of a polished monocrystalline silicon plates coated with a layer of polyvinyl acetate, after which silicon plate is heated with electric potential shift 80 in vacuum, then methane is supplied at pressure 10-30 Torr and curing at a temperature of 1,170±20 °C with cyclic pumping of reaction products and feed fresh methane.EFFECT: technical result consists in significant increase of initial diamond crystals in group process over a considerably shorter process cycle.1 cl, 2 dwg, 1 ex

ethod of processing monocrystalline cvd-diamond and the obtained product // 2580916
FIELD: technological processes.SUBSTANCE: invention relates to processing monocrystalline CVD-diamond material. Described is a method for introducing NV-centres in monocrystalline CVD-diamond material. One stage of the method involves irradiating the diamond material, which contains a single replacing nitrogen Ns 0, for introducing isolated vacancies in the diamond material in the concentration 0.05-1 ppm. Other stage includes annealing irradiated diamond material at temperature of 700-900 °C to form NV-centres from at least some of the defects of single substituent nitrogen and introduced isolated vacancies.EFFECT: this processing of diamond material maximises obtaining of NV-centres, minimising other undesirable defects, which enables to use it in spintronic and associated with colour applications, in particular, for using in fancy pale-rose synthetic precious stones or coloured filters.16 cl, 7 dwg, 12 tbl

Cvd-obtained monocrystalline diamond material // 2575205
FIELD: chemistry.SUBSTANCE: invention relates to technology of obtaining monocrystalline, obtained by chemical vapour deposition (CVD) synthetic diamond material, which can be used as quantum sensors, optic filters, parts of tools for mechanical processing and initial material for formation of coloured precious stones. Diamond material has the total nitrogen concentration immediately after growing, equal or higher than 5 ppm, and uniform distribution of defects, which is determined by one or more of the following characteristics: (i) the total concentration of nitrogen, when it is presented by secondary ion mass spectrometry (SIMS) on the area, equal or larger than 50×50 mcm, with application of analysis area of 10 mcm or smaller, possesses pointwise variation less than 30% of the average value of the total nitrogen concentration, or when it is presented by means of SIMS on the area, equal or larger than 200×200 mcm, with application of analysis area 60 mcm or smaller, possesses pointwise variation less than 30% of the average value of the total nitrogen concentration; (ii) concentration of nitrogen-vacancy defects (NV) immediately after growing equals or is higher than 50 ppb, when measured with application of measurements of UV-visible absorption at 77 K, wherein nitrogen-vacancy defects are uniformly distributed throughout diamond material in such a way that in case of excitation with application of source of laser radiation with wavelength 514 nm with spot size equal or smaller than 10 mcm at room temperature with application of 50 mW laser, operating in continuous mode, and presented on the area, equal or larger than 50×50 mcm, with data interval less than 10 mcm, there is low pointwise variation, ratio of areas of intensities of nitrogen-vacancy peaks of photoluminescence between regions of high photoluminescence intensity and regions of low photoluminescence intensity constitutes less than 2 for either photoluminescence peak (NV0) at 575 nm or photoluminescence peak (NV-) at 637 nm; (iii) variation in Raman intensity is such that at excitation with application of source of laser radiation with wavelength 514 nm (resulting in Raman peak at 552.4 nm) with spot size equal or smaller than 10 mcm, at room temperature with application of 50 mW laser, operating in continuous mode, and presented on area, equal or larger than 50×50 mcm, with data interval less than 10 mcm, there is low pointwise variation, wherein ratio of areas of Raman peaks between regions of low Raman intensity and high Raman intensity constitutes less than 1.25; (iv) concentration of nitrogen-vacancy defects (NV) immediately after growing equals or is larger than 50 ppb when measured with application of measurements of UV-visible absorption at 77 K, wherein at excitation with application of source of laser radiation with wavelength 514 nm with spot size, equal or smaller than 10 mcm, at 77 K with application of 50 mW laser, operating in continuous mode, intensity at 575 nm, corresponding to NV0, more than 120 times exceeds Raman intensity at 552.4 nm, and/or intensity at 637 nm, corresponding to NV-, more than 200 times exceeds Raman intensity at 552.4 nm; (v) concentration of single nitrogen substitution defects (Ns) equals or is larger than 5 ppm, wherein single nitrogen substitution defects are uniformly distributed throughout monocrystalline, CVD-obtained, synthetic diamond material, so that with application of characteristic infrared absorption at 1344 cm-1 and with selection of area larger than area 0.5 mm2, variation, obtained by division of standard deviation by mean value, constitutes less than 80%; (vi) variation in intensity of red luminescence, determined by means of standard deviation, divided by mean value, constitutes less than 15%; (vii) mean standard deviation in concentration of neutral single substitution nitrogen constitutes less than 80%; and (viii) intensity of colouration, measured with application of histogram of image, obtained by microscopy, with mean brightness level larger than 50, wherein intensity of colouration is homogeneous throughout monocrystalline synthetic diamond material, so that variation in gray colour, characterised by standard deviation of brightness level, divided by mean value of brightness level, constitutes less than 40%.EFFECT: diamond material has high and homogeneous distribution of common nitrogen defects, single nitrogen substitution defects Ns, nitrogen-vacancy defects NV, does not have banding under photoluminescence conditions, homogeneity is achieved throughout entire diamond material, grown in the course of one cycle and from cycle to cycle of growing.20 cl, 8 dwg, 5 tbl

Personal adornment // 2573953
FIELD: personal use articles.SUBSTANCE: personal adornment comprises a carrying element; a jewellery element located inside the frame at a distance from the carrying element; and the connection between the carrying element and the jewellery element in a position above the centre of gravity of the jewellery element, so that the jewellery element is able to perform rocking in accordance with the movement of the adornment wearer. The connection connects the body of the jewellery element with the carrying element or connects the retaining element of the decorative element on which the body of the decorative element is fixed with the carrying element. The connection comprises an element of the first ring mounted on the jewellery element; an element of the second ring, which is connected to the element of the first ring and which is mounted on the carrying element; an element of the third ring mounted on the jewellery element in the same position in the gravity direction as the first ring; an element of the fourth ring, which is connected to the element of the third ring and which is mounted on the carrying element in the same position in the direction of gravity as the second ring. The contact points of the first ring and the third ring with the adornment are between the edge of the upper part and the centre of gravity of the jewellery element. The carrying element supports several jewellery elements in different positions in the columns or rows, and several connections of several jewellery elements provide connection of the carrying element and the jewellery element in the upwards position relative to the centre of gravity of the corresponding jewellery element. Several connections of several jewellery elements connect the carrying element and the jewellery element in different positions in the columns. When several jewellery elements are placed in different positions in the columns or rows, it is possible to arrange them so that the adjacent jewellery elements contact with each other and rock together as a result of mutual influence.EFFECT: rocking and vibration of several decorative elements is provided as a result of mutual influence.12 cl, 13 dwg

Production of single-crystal white diamond // 2558606
FIELD: process engineering.SUBSTANCE: invention relates to production of diamonds for jewelry. This process comprises placing the substrate with diamond grain of preset size and preset optical orientation into chemical vapour-phase deposition (CVD). Then, hydrogen, hydrocarbon gas containing carbon, nitrogen and gas including diborane are fed into the chamber. Both are adapted for acceleration of diamond growth on said substrate. Electric field is applied to form plasma nearby said substrate to cause stepwise diamond growth thereat. CVD process is terminated in the chamber, faceting is performed and undesirable diamond is removed from grown diamond. Diamond is cleaned and facetted after annealing at preset temperature for preset time interval. Fining faceting of diamond is performed, it is finished and dyed.EFFECT: white diamonds (G and H) with, practically, no defects.13 cl, 10 dwg

Controlled formation of dislocations in monocrystalline synthetic diamond material // 2550197
FIELD: chemistry.SUBSTANCE: invention relates to production of monocrystalline diamond material by chemical vapour deposition (CVD), which is used in optical, mechanical, fluorescent and/or electronic devices. A diamond layer contains a mesh of nonparallel intercrossing dislocations as seen on an X-ray topographic sectional image or in conditions of a fluorescent technique, wherein the layer has thickness equal to or greater than 1 mcm; the mesh of nonparallel dislocations stretches across a volume which is at least 30% of the total volume of the diamond layer, and wherein the mesh of nonparallel dislocations contains a first set of dislocations propagating in a first direction through the diamond layer, and a second set of dislocations propagating in a second direction through the diamond layer, wherein the angle between the first and second directions is in the range of 40° to 100°, as seen on an X-ray topographic sectional image or in conditions of a fluorescent technique.EFFECT: invention enables to control the type and/or direction of dislocations in a diamond material without affecting optical and/or electronic properties of devices based on said material and optimise said properties for a specific application.12 cl, 8 dwg, 2 tbl, 3 ex

Decorative element in hidden fixture // 2546501
FIELD: process engineering.SUBSTANCE: invention relates to jewellery. Decorative comprises several stones and device for their fastening. Fastener comprises a single bed produced by electric deposition and shaped to one part of said stones to allow attachment of all stones to each other without no extra force. Said single bed has at least one conducting ply to be deposited on the stones. Stone girdles are arranged abut so that single bed is invisible. Invention relates also to the method of making said element or jewellery article or to watches with said decorative element.EFFECT: higher safety of stones.20 cl, 21 dwg

ethod of obtaining fancy light-blue or fancy light greenish blue monocrystalline cvd-diamond and obtained product // 2540624
FIELD: chemistry.SUBSTANCE: invention relates to technology of producing coloured diamond materials, which can be applied as precious stones or cutting instruments. Method includes stages of growing monocrystalline diamond material in accordance with CVD-technology, with diamond material having concentration of single substituting nitrogen atoms [Ns 0] less than 1 ppm; initial CVD-diamond material is colourless, or, in case it is not colourless, then, according to colour gradation brown or yellow, and if it is brown according to colour gradation, then it has level G (brown) of colour gradation or better for diamond stone with 0.5 carat weight with round diamond cut, and if it is yellow according to colour gradation, it has level T (yellow) of colour gradation or better for diamond stone with 0.5 carat weight with round diamond cut, and irradiation of initial CVD-diamond by electrons to introduce isolated vacancies into diamond material in such a way that product of the total concentration of vacancies × way length [Vt]×L, in irradiated diamond material at said stage or after additional processing after irradiation, including annealing irradiated diamond material at temperature at least 300°C and not higher than 600°C, constitutes at least 0.072 ppm cm and not more than 0.36 ppm cm.EFFECT: diamond material becomes fancy light-blue or fancy light greenish blue in colour.21 cl, 4 dwg, 3 tbl, 9 ex

Diamond faceting // 2537278
FIELD: process engineering.SUBSTANCE: invention is intended for use in production of jewellery. Proposed method consists in diamond site shaping to cone with cone generatrix angle to girdle plane. Diamond faceting features the following parameters: diamond diameter D, total height H=0.61D, cone base d=0.52D, girdle depth r=0.04D, top height with girdle h1=0.22D, bottom height to girdle h2,=0.39D, inclination of top faces to girdle plane 23.5°, bottom inclination to girdle plane 38.5°, cone generatrix inclination to girdle - 17°.EFFECT: perfected diamond dye play.1 dwg

Facet-ground composite body // 2523996
FIELD: process engineering.SUBSTANCE: decorative composite body (1) comprises glass body (2) and polymer (3) to cover partially said glass body (2). Portion of glass body surface is located on outer surface of decorative composite body (1). Note here that at least two adjacent areas (8) of glass and polymer material (3) on composite body (1) outer side are ground in as-boded state. Glass body (2) areas verging on polymer material (3) are provided, at least partially, with mirror coat.EFFECT: ruled out air bubbles and optical defects.21 cl, 22 dwg

Synthetic cvd diamond // 2516574
FIELD: chemistry.SUBSTANCE: invention relates to technology of production of synthetic diamond material, which can be applied in electronic devices. Diamond material contains single substituting nitrogen (Ns0) in concentration more than 0.5 ppm and having such complete integral absorption in visible area from 350 nm to 750 nm, that at least nearly 35% of absorption is attributed to Ns0. Diamond material is obtained by chemical deposition from vapour or gas phase (CVD) on substrate in synthesis medium, which contains nitrogen in atomic concentration from nearly 0.4 ppm to nearly 50 ppm, and gas-source contains: atomic part of hydrogen, Hf from nearly 0.40 to nearly 0.75, atom part of carbon, Cf, from nearly 0.15 to nearly 0.30; atomic part of oxygen, Of, from nearly -.13 to nearly 0.40; and Hf+Cf+Of=1; ratio of atomic part of carbon to atomic part of oxygen, Cf:Of, satisfy the ratio nearly 0.45:1<Cf:Of< nearly 1.25:1; and gas-source contains atoms of hydrogen, added in form of hydrogen molecules, H2, with atomic part of the total quantity of present atoms of hydrogen, oxygen and carbon between 0.05 and 0.40; and atomic parts of Hf, Cf and Of represent parts from the total quantity of atoms of hydrogen, oxygen and carbon, present in gas-source.EFFECT: invention makes it possible to obtain diamond material with rather high content of nitrogen, which is evenly distributed, and which is free of other defects, which provides its electronic properties.17 cl, 11 dwg, 6 ex

ethod for making fancifully coloured orange monocrystalline cvd-diamond, and finished product // 2497981
FIELD: metallurgy.SUBSTANCE: monocrystalline diamond material that has been grown using a CVD method and has concentration of single substituent nitrogen [Ns 0] of less than 5 ppm is irradiated to introduce isolated vacancies V to at least some part of the provided CVD-diamond material so that total concentration of isolated vacancies [VT] in the obtained diamond material is at least more than (a) 0.5 ppm and (b) by 50% more than concentration [Ns 0] in ppm in the provided diamond material; after that, annealing of the obtained diamond material is performed so that chains of vacancies can be formed from at least some of the introduced isolated vacancies at the temperature of at least 700°C and maximum 900°C during the period of at least 2 hours; with that, irradiation and annealing stages reduce the concentration of isolated vacancies in diamond material, due to which concentration of isolated vacancies in the irradiated and annealed diamond material is <0.3 ppm.EFFECT: diamonds obtain fancifully orange colour during such treatment.16 cl, 3 dwg, 4 tbl

ethod for faceting diamonds with culet // 2489951
FIELD: personal use articles.SUBSTANCE: invention is designed for being used in jewellery industry. The method for faceting diamonds with a culet involves faceting of a round-shaped diamond faceted so that to form a culet. Within the culet, one grinds out and polishes arc-shaped grooves from opposite edges of the diamond bottom facets. The arc-shaped grooves have a section angle equal to 41°.EFFECT: ensuring complete reflection of light from the culet thus creating additional brilliance of the stone.2 dwg

ethod for faceting diamonds with culet // 2489070
FIELD: personal use articles.SUBSTANCE: invention is designed for being used in jewellery industry. The method for faceting diamonds with a culet involves faceting of a round-shaped diamond faceted so that to form a culet; within the culet, one grinds out and polishes an internal pyramid with a polygon-shaped base the sides whereof are parallel to those of the culet polygon. The pyramid is ground out and polished at the angle between opposite sides equal to 98.5°.EFFECT: ensuring complete reflection of sunbeams from the culet thus creating additional brilliance of the stone.2 dwg

ethod of faceting diamonds with culet // 2486853
FIELD: process engineering.SUBSTANCE: invention is intended for use in production of jewelry. Proposed method comprises faceting round diamond to form a culet. Inner taper with solid angle of 98.5° is ground and polished in said culet.EFFECT: complete reflection of light from cullet to create extra stone brilliance.2 dwg

ethod of diamond heat treatment // 2471542
FIELD: process engineering.SUBSTANCE: invention relates to processes used in operation at high pressure and modifying substances physically. Proposed method comprises placing diamond in reaction cell in pressure transmitting medium, increasing pressure in reaction chamber and it cooling. Note here that thermal treatment is carried out at temperature increase rate of 10-50°C/s and at 2000-2350°C by passing electric current via heater in cell from programmed power supply source with due allowance for temperature relaxation in said cell in heating. For this, note also that temperature relaxation constant is defined. Said cell is cooled after heating by switching off power supply in forming short diamond heating pulse in temperature range of over 2000°C with diamond total stay time smaller than 30 seconds. Allowance for temperature relaxation in said cell in heating for heating rate Vt and pre-definition of cell temperature relaxation constant τ is made by setting in said programmable power source the maximum temperature of heating to τVT above maximum treatment temperature of 2000-2350°C.EFFECT: changing colour of low-grate natural diamond without notable graphitisation, high-quality gem diamonds.2 cl, 5 dwg, 3 ex

ethod of forming optically permeable image inside diamond, apparatus for realising said method (versions) and apparatus for detecting said image // 2465377
FIELD: physics.SUBSTANCE: inside a diamond, in the region free from optically impermeable irregularities, an image is formed, which consists of a given number of optically permeable elements of micrometre or submicrometer size, which are clusters of N-V centres which fluoresce in exciting radiation, wherein formation of clusters of N-V centres is carried out by performing the following operations: treating the diamond with working optical radiation focused in the focal region lying in the region of the assumed region where the cluster of N-V centres is located, while feeding working ultrashort radiation pulses which enable to form a cluster of vacancies in said focal region and which provide integral fluence in said focal region lower than threshold fluence, where there is local conversion of the diamond to graphite or another non-diamond form of carbon; annealing at least said assumed regions where clusters of N-V centres are located, which provide in said regions drift of the formed vacancies and formation of N-V centres, grouped into clusters in the same regions as the clusters of vacancies; controlling the formed image elements based on detection of fluorescence of N-V centres by exposing at least regions where image elements are located to exciting optical radiation, which enables to excite N-V centres and form a digital and/or a three-dimensional model of the formed image. Images formed in diamond crystals from clusters of N-V centres are visible to the naked eye, by a magnifying glass and any optical or electronic microscope.EFFECT: image from a cluster of N-V centres is inside the crystal, cannot be removed by polishing and is therefore a reliable diamond signature and reliable recording of information without destroying or damaging the crystal itself.46 cl, 3 dwg

ethod of diamond color faceting // 2453256
FIELD: process engineering.SUBSTANCE: invention is intended for used in production of jewelry. Proposed method consists in that the angle between opposite faces is made equal to 77°. Note here that faceting features the following parameters: diamond diameter D, total height H=0.76 D, site size d=0.67 D, girdle thickness r=0.08 D, height of top with girdle h1=0.11 D, height of bottom to girdle h2=0.65 D, height of bottom face twist h3=0.42 D, top inclination to girdle plane 10°, bottom inclination to girdle plane: ahead of twist 51.5°, behind twist 55°.EFFECT: fivefold internal reflection of light rays and increased dispersion.1 dwg

Procedure for production of diamonds of fantasy yellow and black colour // 2434977
FIELD: metallurgy.SUBSTANCE: procedure consists in ion-energy-beam processing diamonds with high power ion beam of inert chemical element of helium with dose of radiation within range from 0.2×1016 to 2.0×1017 ion/cm2 eliminating successive thermal annealing.EFFECT: production of amber-yellow and black colour of diamond resistant to external factors at significant reduction of material and time expenditures of process of diamond upgrading.1 dwg, 2 ex
Procedure for simultaneous production of several faceted valuable stones of synthetic silicon carbide - moissanite // 2434083
FIELD: metallurgy.SUBSTANCE: procedure consists in simultaneous growth of multitude of work pieces of moissanite crystals in cellular mould of forming graphite, in dividing them to separate crystals, in faceting, grinding and in polishing. Before faceting, grinding and polishing work pieces are first glued on a mandrel, then they are re-glued on a back side. Moissanite is polished on a ceramic polisher rotating at rate from 200 to 300 rpm with utilisation of diamond powder (spray) with dimension of a grain from 0.125 to 0.45 mcm, facilitating depth of grooves less, than length of light wave of a visible part of spectre. Also, cut and chipped edges of the work piece with defects not suitable for faceting, are crumbled and returned to a stage of growth. Grinding paste with size of a grain 0.25 mcm can be used for grinding.EFFECT: increased quality of crystals, increased efficiency due to elimination of cutting operation; reduced expenditures for production and losses of material at cutting during work piece growth.2 cl, 3 ex

Piece of jewellery // 2433769
FIELD: personal use articles.SUBSTANCE: invention relates to jewellery, namely, to pieces of jewellery made of precious and semiprecious stones. A piece of jewellery comprises a substrate made in the form of a spherical body with smooth outer surface and a core, preferably a pearl, with a radially arranged cone-shaped seat, in which the base is located near the outer surface of the substrate, and the top is located inside the substrate core. The piece of jewellery comprises a smooth or a faceted insert, preferably a precious or a semiprecious stone, made of a pavilion fixed with the help of a fixing agent in the substrate seat, a girdle and a crown. In the substrate core in the area of the seat top along the axis (0-0) of the substrate there is a hole provided, where the top of the insert pavilion is installed. The base of the substrate seat is made with a groove, where the girdle and the crown of the insert are placed. The diameter (d) of the hole made in the substrate core in the area of the seat top along the axis (0-0) of the substrate is selected as equal to 0.1-0.9 of the diameter (D) of the substrate seat base. The diameter (d1) of the substrate seat base deepening is selected as equal to 1.01-1.20 of the diameter (D2) of the insert girdle, and the depth (h) of the substrate seat base deepening is chosen as equal to 0.8-2.0 of the sum of heights (h1+h2) of the girdle (h1) and the crown (h2) of the insert.EFFECT: invention increases reliability of insert fixation in the substrate seat.4 dwg

Procedure for radiation of minerals // 2431003
FIELD: metallurgy.SUBSTANCE: procedure for radiation of minerals in neutron flow of reactor in container consists in screening radiated minerals from heat and resonance neutrons. Composition of material and density of the screen is calculated so, that specific activity of radiated minerals upon completion of radiation and conditioning does not exceed 10 Bq/g. Before radiation contents of natural impurities in radiated minerals can be analysed by the method of neutron activation analysis. Only elements activated with resonance neutrons are chosen from natural impurities of radiated minerals. Tantalum and manganese or scandium and/or iron or chromium are used as elements of the screen. Chromium-nickel steel alloyed with materials chosen from a row tantalum, manganese and scandium are used in material of the screen.EFFECT: increased protection of product from resonance neutrons activating impurities in minerals.5 cl, 1 tbl

Diamond for decoration, which has two-stage pavilion // 2427299
FIELD: personal demand items.SUBSTANCE: invention is designed for being used in jewellery industry. Diamond for decoration is made in the form of very bright diamond with multiple reflection patterns when it is viewed from above the facet of the platform and facets of diamond crown. Diamond has the same crown as the diamond with round brilliant cut, but its pavilion consists of the first pavilion and the second pavilion, which are separated with horizontal separation line. The second pavilion represents octagonal pyramid and its side edges form the main facets of the second pavilion. The first pavilion represents hexadecagonal truncated pyramid with upper edge on horizontal separation line, and its lateral sides form the first lower facets of girdle. The main facets of the first pavilion spread from girdle and between the first lower facets of girdle, inward between the main facets of the second pavilion.EFFECT: diamond for decoration, which has two-stage pavilion, in comparison to conventional diamond with round brilliant cut is brighter and has doubled number of reflection patterns.12 dwg

ethod of making identification mark for marking valuable articles and valuable article with said mark // 2427041
FIELD: information technology.SUBSTANCE: marked surface of the mark is polished and a processing layer (PL) is deposited, through which an image of the mark (M) is created on the surface in form of a diffraction structure (DS) which is optically visible in reflected light at diffraction angle. The DS is of the reflective phase grating type and is formed through ion etching of the surface together with the PL. Before formation of M on the surface, the DS is formed in the PL in form of a regular microrelief of a sinusoidal profile through ablation of the material of this layer using a pulse of interfering beams of coherent laser radiation. As a result, a DS is formed in the PL with holographic accuracy. The DS is formed through partial removal of material of the PL within its thickness. The image M in form of DS on the marked surface is also formed with holographic accuracy, which is provided through interfering coherent laser beams. The DS formed in the PLS is exposed to an ion beam. The process cycle for forming the M is carried out using a template mask together with the DS which forms the final image of the mark on the surface of the article.EFFECT: high contrast of the mark with maximum definition.7 cl, 7 dwg

Synthetic material for jewellery industry and method of its production // 2426488
FIELD: personal use articles.SUBSTANCE: group of inventions relates to materials for jewellery industry, in particular, to synthetic materials that serve to replace natural jewellery stones, and to method of their production. A synthetic coloured or colourless, transparent, semi-transparent or non-transparent composite nanocrystalline material is proposed for jewellery industry on the basis of nanosize oxide and silicate crystalline phases. The material comprises at least one of the crystalline phases listed below: spinel, quartz-like phases, sapphirine, enstatite, petalite-like phase, cordierite, villemite, zircon, rutile, zircon titanate, zircon dioxide. Material colour is provided by ions of transition, rare-earth elements and noble metals in amount from 0.001 to 4 mol%. The method of material production includes melting of initial selected mixture of components at the temperature that is 200-300°C higher than liquidus, cooling of melted material down to the temperature of 1300-1450°C with giving it the necessary shape, baking at the temperature of 640-700°C, when material viscosity is equal to 1010.5-1011 Pa·s, and subsequent additional thermal treatment at the temperature from 680 to 850°C within 1-24 hours, then at the temperature from 900 to 1200°C within 1-24 hours.EFFECT: group of inventions provides for hardness, chemical resistance and stability of material colour to thermal shocks.3 cl, 2 tbl

Identification mark to mark valuable items and valuable item with its application // 2426487
FIELD: personal use articles.SUBSTANCE: invention relates to an identification mark to mark valuable items, preferably precious stones, and to a valuable item with its application. The identification mark to mark valuable items is arranged in the form of an optically visualised image formed on a polished surface of the item and arranged as a diffraction structure, in particular, of microstrokes of sinusoidal profile. The diffraction structure is arranged as a reflecting phased diffraction grid, which functionally is a facility to increase contrast and to vary a colour tone of radiation spectrum, at the same time microstructures of the diffraction structure are made at the depth, which does not exceed the permissible value of microirregularities in the generally accepted technology of precious stones polishing. The image of the mark is made with geometrical dimensions, sufficient for its visual perception at the angle of diffraction in the reflected light with the naked eye without additional magnification, at the same time shape and relative space arrangement of microstructures in the diffraction structure are realised with holographic accuracy ensured by means of interfering coherent laser beams.EFFECT: invention ensures high contrast of the mark and minimises deterioration of marked surface quality.3 cl, 7 dwg

Diamond for adornment, which has two-tier pavilion // 2421112
FIELD: personal use articles.SUBSTANCE: invention relates to jewellery industry. A diamond for an adornment is produced as an extremely bright diamond with multiple reflection patterns, when it is examined being above a table facet and facets of the diamond crown. The diamond has the same crown, since it is a diamond with round diamond cut, but its pavilion consists of the first pavilion and the second pavilion separated with a horizontal division plane. Lower facets of a belt and main facets of the pavilion are truncated relative to the horizontal division plane arranged between the first and second pavilion, at the same time the angle of the first pavilion faces is more than the angle of the second pavilion faces inclination.EFFECT: diamond for an adornment, having a two-tier pavilion, compared to a conventional diamond with round diamond cut shines more and has doubled quantity of reflection patterns.11 dwg
Crude mixture for making artificial stone // 2418112
FIELD: chemistry.SUBSTANCE: crude mixture for making artificial stone contains the following in wt %: semi-white glass 50-70; crystal glass 29.9-49.9; cobalt oxide 0.01-0.15.EFFECT: obtaining artificial stone which looks like colourless topaz with different colour intensity.1 tbl
Crude mixture for making artificial stone // 2418111
FIELD: chemistry.SUBSTANCE: crude mixture for making artificial stone contains the following in wt %: crystal glass 60-70; semi-white packing glass 5-7; cobalt carbonate 0.001-0.005; cerium dioxide 0.001-0.005; incandescent lamp bulb glass - the rest.EFFECT: obtaining artificial stone which looks like colourless topaz.1 tbl

Superstrong single crystals of cvd-diamond and their three-dimensional growth // 2389833
FIELD: electricity.SUBSTANCE: method includes placement of crystalline diamond nucleus in heat-absorbing holder made of substance having high melt temperature and high heat conductivity, in order to minimise temperature gradients in direction from edge to edge of diamond growth surface, control of diamond growth surface temperature so that temperature of growing diamond crystals is in the range of approximately 1050-1200°C, growing of diamond single crystal with the help of chemical deposition induced by microwave plasma from gas phase onto surface of diamond growth in deposition chamber, in which atmosphere is characterised by ratio of nitrogen to methane of approximately 4% N2/CH4 and annealing of diamond single crystal so that annealed single crystal of diamond has strength of at least 30 MPa m1/2.EFFECT: increased strength.26 cl, 4 dwg

ethod of embedding mark into diamond, obtained through chemical deposition // 2382122
FIELD: chemistry.SUBSTANCE: method of embedding trade marks or identification marks into monocrystalline diamond material, obtained through chemical gas-phase deposition, involves preparation of a diamond substrate and initial gas, dissociation of the initial gas, which provides the process of homoepitaxial growth of diamond, and to put trade marks or identification marks into synthetic diamond material at least one dopant chemical element selected from a group comprising nitrogen, boron and silicon is introduced into the synthesis process in a controlled manner in form of defect centres which upon excitation emit radiation with characteristic wavelength and in such concentration such that the trade mark or identification mark, under normal observation conditions, should not be easily seen or should not affect the perceived quality of the diamond material, but should be seen or become seen when illuminated with light with wavelength of the excited defect centres, the value of which is less than the said characteristic wavelength of radiation emitted by the defect centres, and visible under observation conditions where the said illumination is not visible to the observer.EFFECT: invention simplifies determination of synthetic nature of diamond material.52 cl, 4 ex, 19 dwg

Identification mark for marking valuables and method of making said mark // 2373307
FIELD: physics.SUBSTANCE: invention relates to apparatus and methods of marking valuables, mainly precious stones, particularly cut diamonds, and can be used for subsequent identification of data of the valuables. Mark 1 is made in form of an image, which is optically visualised in diffraction-reflection light, made on the polished surface 3 of the valuable object 2. The structure of the image is formed by a modified area of the surface layer of the object 2 with optical properties in the said area, which is functionally the image of mark 1, altered from the initial properties. The modified area is made in form of microlines 8, spatially formed according to type of the reflection grating, which is functionally an apparatus for increasing contrast of visual perception of the image of marker 1 in at least one of the colour hues of the spectrum of incident radiation. The structure of microlines of the modified area includes at least one impurity additive, which is selected from a group which includes noble metals or boron, ion-implanted into atomic lattices of the initial material of the object without breaking interatomic bonds of these lattices and, therefore, without changing quality of the polished surface of the object, but with change of the complex refractive index of this material. According to the method of making mark 1, before modification, a technological layer (TL) of material, which is removed after modification, is deposited on surface 3. A structure is formed in the technological layer according to type of the line grating. The corresponding area of the surface layer is modified by exposing this area to an ion beam through a mask with an image of mark 1 and the spatial structure formed in the technological layer, that way creating process conditions implantation of modifier ions into the modified area of the surface layer of the material of object 2 without breaking bonds in the atomic lattices of this material and, therefore, without changing initial quality of polishing the surface layer, but with change of its initial optical properties. The modifier used is impurity additives, selected from a group which includes noble metals or boron, ions of which alter the complex refractive index of the modified layer.EFFECT: design of an efficient method of marking precious stones.5 cl, 1 ex,7 dwg

Personalised grown gem diamond // 2372286
FIELD: mining.SUBSTANCE: invention relates to artificail gem diamonds identifiable with a certain person or animal. A personalised gem diamond is grown from a charge that includes carbon being a product of carbonisation of the material provided by the customer, powder of spectroscopically pure graphite and a marker for which at least two elements are used that are selected from a lanthanide group and taken in a arbitrarily prescribed ratio to the extent between 0.01 to 10 mcg /g.EFFECT: improved authenticity of identification of a personalised diamond.1 ex, 3 dwg

Precious stone and method of its faceting // 2364305
FIELD: items of private and domestic use.SUBSTANCE: it is received blank of cubic form stone, which is fixed by means of binder in mandrel with peg-shaped jack, so that blank vertex match to the bottom of jack, and its ribs rest walls of jack. Than mandrel is fixed in collet of faceting head and blank is treated according to selected shape of faceting, herewith ajoint of corona and pavilion of stone there are implemented three arched ribs. Precious stone is received from of square blank, contains located in several layers or belts angularly related to each other verges, forming corona and pavilion, at joint of which there are formed three arched ribs.EFFECT: material saving, essential simplification of stone process technology.16 cl, 20 dwg, 3 tbl

Oval-cut diamond // 2363363
FIELD: individual supplies.SUBSTANCE: oval-cut diamond features girdle of elliptic or near-elliptic shape, crown above girdle with octagonal table facet at the crown top, and pavilion below girdle. Girdle side ratio (b/a) is 0.6 or more, where a is radius by longer axis and b is radius by shorter axis. Two main facets of pavilion opposing against central axis have a couple of main crown facets or a couple of star facets positioned opposite to two main pavilion facets over the girdle. Two main pavilion facets, two main crown facets or star facets and table facet have common vertical plane in these facets.EFFECT: enhanced glittering in reflected light irradiated over table facet and crown facets.14 cl, 33 dwg, 4 tbl, 6 ex

Oval cut diamond // 2362468
FIELD: personal and household objects.SUBSTANCE: oval cut diamond includes a girdle which has a contour line with the shape of an oval or closer to oval, a crown above the girdle, which has an octagonal tablet facet at the top of the crown, and a pavilion below the girdle. Such a diamond is a modified oval cut diamond, in which the crown and pavilion are turned a sixteenth of the value of the complete angle about their central axis compared to the common brilliant cut diamond. The girdle has ratio (b/a) of the short radius to the long radius of 0.6 or more. In the girdle, the radius in the direction of the long axis is denoted by "a", and the radius in the direction of the short axis is denoted by "b". The pair of main pavilion facets, lying opposite each other about the central axis, has a pair of main crown facets or star-shaped facets, lying opposite pairs of main pavilion facets through the girdle. Two main pavilion facets, two main crown facets or star-shaped facets or tablet facets have a common vertical plane within the limits of the facets.EFFECT: glitter from the tablet facet or crown facet is amplified.8 cl, 23 dwg, 2 tbl, 3 ex
Concrete mix for bead and insert manufacturing for jewellery // 2354270
FIELD: individual supplies.SUBSTANCE: concrete mix is intended for manufacturing of beads and inserts for jewellery, imitating 'stone' (rings, cuff links, brooches etc.). Mix includes concrete, process waste of rock crystal and/or citrine and/or amethyst and/or rose quartz, and water.EFFECT: concrete mix applicable for obtaining various jewellery of original design, with enhanced durability and decorative properties.1 tbl, 1 ex
ethod of obtaining jewellery personificated diamond // 2336228
FIELD: chemistry, technological processes.SUBSTANCE: invention allows to obtain memorial diamond from pale-yellow to light-blue tint depending on content of admixture in it, which is identified with exact person and is an object, which reminds of him/her. Method includes processing of biological material belonging to exact individual, and growing on its basis artificial diamond by acting on it with high pressures and temperatures. Processing is performed by mechanical grinding, preliminary drying, chemical processing in hydrochloric acid, chemical processing with complex-former Trilon-B, chemical processing with mixture of mineral acids - hydrofluoric and nitric or sulfuric acids, repeated washing after each chemical processing with said reagents to neutral reaction, filtration and drying until pure highly-dispersive carbon of biological origin is obtained.EFFECT: obtaining carbon of high purity with characteristic microelements for exact individual.6 cl, 3 tbl

Diamond of improved rectangular diamond cut // 2318420
FIELD: jewelry.SUBSTANCE: diamond of rectangular cut has beveled facets. Each of said beveled facets adjacent to four apexes of crown has fracture extending along diagonal line parallel to belt so as to form facet configuration wherein beveled facet is divided into lower beveled facet and upper beveled facet. Upper angle of upper beveled facet crown may be made smaller than angle of lower beveled facet crown and, accordingly, even without altering of crown height, so that sign of facet is slightly smaller. Deviation angles of star facets and of second beveled facets from horizontal plane, provided that both are capable of intensive reflection, may be made small, and areas of these facets may be made large. Thus, all reflection patterns become similar in size to the extent that is preferable for visual perception. By making star facets and second beveled facets so that they have small angle of deviation from horizontal plane, extremely intensive reflection may obtained and increased areas of star facet and second beveled facets may be provided. This allows cut to be provided, which is characterized by extremely intensive reflection (the number of visually perceptible beam reflections).EFFECT: improved rectangular diamond cut by providing optimal shape of facet configuration for increasing the number of visually perceptible reflected beams.10 cl, 19 dwg
Boron-alloyed diamond // 2315826
FIELD: carbon materials.SUBSTANCE: invention relates to preparation of boron-alloyed monocrystalline diamond layers via gas phase chemical precipitation, which can be used in electronics and as jewelry stone. The subject matter is uniformity of summary boron concentration in above-mentioned layer. The latter is formed in one growth sector and characterized by thickness above 100 μm and/or volume exceeding 1 mm3. Boron-alloyed monocrystalline diamond preparation involves diamond substrate provision step, said substrate having surface containing substantially no crystal lattice defects, initial boron source-containing gas preparation step, initial gas decomposition step, and the step comprising homoepitaxial growth of diamond on indicated surface containing substantially no crystal lattice defects.EFFECT: enabled preparation of thick high-purity monocrystalline diamond layers exhibiting uniform and useful electronic properties.44 cl, 5 tbl, 7 ex

ethod of producing colored diamond // 2314368
FIELD: producing artificial diamonds.SUBSTANCE: method comprises preparing diamond substrate virtually having no defects, preparing the initial gas, decomposing initial gas to produce the atmosphere for synthesis that nitrogen concentration of which ranges from 0.5 to 500 particles per million, and homogeneous epitaxy growth of diamond on the surface.EFFECT: increased thickness of diamond.40 cl, 9 dwg, 5 ex

Diamond gem-cutting structure providing multiplicity of visually perceived diffracted beams for decorative usage and method for evaluating the same // 2309650
FIELD: decorative diamond gem-cutting structure and method for evaluating of diamond.SUBSTANCE: gem-cutting structure is made in the form of round diamond gem-cut comprising rundist, crown above rundist and pavilion under rundist. Height of rundist is 0.026-0.3 the radius of rundist, angle of pavilion of rundist main facet is ranging between 37.5 deg and 41 deg, and angle of main facet of crown is within the range conforming to the following ratios: c>2.8667xp+134.233 and p<1/4x{sin-1(1/n)+sin-1 (1/n˙sinc))x180/π +180-2c}, where n is diamond diffraction ratio; π is circle constant; p is angle of pavilion, deg; c is angle of crown, deg. Decorative diamond cutting design presents multiplicity of visually perceptible diffracted beams, when observer contemplates diamond on the side of pavilion facet at sight angle less than 20 deg relative to vertical line extending through center of facet of platform.EFFECT: increased number of perceived diffracted beams to impart additional aesthetic attractiveness to diamond.13 cl, 43 dwg

Diamond "timur" // 2309649
FIELD: jewelry industry, in particular, diamond faceting.SUBSTANCE: diamond is made in the form of rectangle with beveled angles and has side faces to be polished. Angles of inclination to rundist plane of crown main faces are 30 deg, of crown paired wedges - 34 deg, of rundist faces - 90 deg, of pavilion main faces - 39 deg, of pavilion wedges - 50 deg, of paired wedges - 45 deg, of angular paired wedges - 41 deg. Diameter of platform is 64%, height of crown is 15%, height of rundist is 2%, depth of pavilion is 43%, total height is 60% of rundist diameter.EFFECT: reduced labor intensity for stone faceting and increased efficiency in utilization of rough diamonds.3 dwg
ethod of coloring fianites // 2296825
FIELD: jewelry industry; optics.SUBSTANCE: proposed method is used for coloring fianites (man-made diamonds) in green, blue and brownish-yellow colors; proposed method may be also used in optics for production of colored light filters withstanding temperatures above 1000°C. Proposed method includes preliminary application of cobalt on fianite surface to be colored and at least one metal whose oxide is liable to spinelle-forming with oxide of bivalent cobalt, iron and/or aluminum, for example. Then material is subjected to heat treatment in oxygen-containing atmosphere at temperature above 1000°C but not exceeding the fianite melting point. The procedure is continued for no less than 3 h. Coat is applied by thermal spraying of metals in vacuum. Said metals may be applied in turn and simultaneously. For obtaining bluish-green color of fianite, cobalt and aluminum are applied at atomic ratio of 1:1 to 1:2. For obtaining yellowish-green color, cobalt, aluminum and iron are applied at atomic ratio of 1:1 :0.1-0.2. For obtaining yellowish-brown color, cobalt and iron are applied at ratio of 1:1 to 1:2.EFFECT: enhanced resistance to high temperature and chemical action.7 cl, 11 ex

onocrystal diamond layer of high thickness, method of production of such layer and precious stones made from this layer // 2287028
FIELD: production of diamond layers.SUBSTANCE: diamond layer at thickness more than 2 mm is obtained through chemical deposition from gaseous phase. Method includes homo-epitaxial growth of diamond layer on surface of backing at low level of defects in atmosphere containing nitrogen at concentration lesser than 300 billion parts of nitrogen.EFFECT: improved quality of diamond layers.36 cl, 10 dwg, 1 tbl, 4 ex
Personified grown jewelry diamond and method for producing the same // 2282584
FIELD: jewelry industry, in particular, production of precious stone, more particular diamond which may be personified or identified with certain individual or animal.SUBSTANCE: personified grown jewelry diamond comprises heavy metals Sr, Cd, Sn, Ba, Pb, Bi separated from hairs of certain individual or animal, with ratio of concentrations of said metals corresponding to that of said elements in hairs of the given individual or animal. Method involves processing hairs of certain individual or animal by mineralization of hairs at temperature below 550 C until complete decomposition of organic component; forming source for growing of diamond from spectrally pure graphite and hair processing product containing heavy metals Sr, Cd, Sn, Ba, Pb, Bi; growing diamond from melt by seed crystal recrystallization process; determining ratio of concentrations of these elements in grown diamond and comparing with their content in processing product. Jewelry diamond produced has microelements characteristic of certain individual or animal.EFFECT: simplified method and improved quality of grown jewelry diamond.3 cl, 2 tbl
 
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