Method for faceting diamonds with culet

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

 

Description of the invention.

The invention relates to the processing of diamonds with caletti and may find application in the processing of rough diamonds.

Known manufacturing process of diamond, described in the patent WO 2009/144594 issued by the International Organization for Intellectual Property on 7 April 2009. It describes the process, which explores the diamond raw material with the cloud inclusions, and the diamond is cut so that the geometrical shape of the inclusions was aesthetic interest, associative interest, i.e. interest because of their symbolism or connections with religion, country or other social or cultural groups. Diamond is processed in the form of a round brilliant cut, the lack of which is the size of kalety, which for a clearer display of the geometric forms of involvement can be as high as 40% of the site, which in turn reduces the reflection.

The closest in characteristics to the proposed technology is a way to cut diamonds, described in the book Epifanov VI and other "Technology of processing of diamonds". M.: Vysshaya SHKOLA, 1987, s. This form of cutting is called "Princess". Diamonds Princess" have plates with alternating right grooves. Each record can be granina in any shape (square, right in Golnik, polygon, heart-shaped). The top plate is polished in the form of tabular ground with a small number of faces, the bottom is cut by a series of V-shaped grooves at an angle of 41°. These grooves is provided by total internal reflection of light between the two faces of the adjacent grooves.

However, grinding Calley in the round diamond technology "Princess" V-groove allows to obtain total internal reflection only from the adjacent parallel grooves.

The basis of the invention is to develop a method of processing diamonds with dimensions that do not allow for the height of the stone to grind the bottom of the diamond with the dowel at an angle of more than 98,5°. Cut the bottom of the diamond under the ideal angle is only possible with caletti. Caletta, the form of which would create internal reflection closest to the reflection of a thorn, and would be of aesthetic interest at the expense of the star pattern.

The task is solved in that a method of grinding and polishing caletti by fillipovcy in stone on Colette arcuate grooves with a V-shaped profile, the angle in cross section which is 41°. Arc visitwales and polished on Colette in the form of eight-pointed star. The star is located on Colette, resting with their ends between the opposite edges of the bottom faces of the diamond.

Such a technological solution which allows the rays of light passing through the area, to be reflected from the surface of the star resulting in Calette not pass through it, and to reflect on the Playground and on the verge of a diamond.

Thus, the above processing solution caletti allows to achieve the objectives of the invention and to obtain the technical result in a complete reflection of light from caletti and creating additional brilliance of the stone.

Author unknown solutions with the above essential attribute.

Therefore, the present technical solution meets the requirements of "novelty" and "the materiality of differences".

Figure 1 is a side view, cut diamonds with an internal taper at Colette; figure 2 is a bottom view of the diamond.

The method is as follows.

The diamond is placed in a special collet fixture and produce fillipovka in Colette with diamond circle with the cutting in the shape of a triangle in cross section with an angle of 41° arcuate grooves on opposite edges of the bottom faces of the diamond. After grinding the resulting star polished.

The use of the present invention to cut diamonds with caletti will significantly improve "the game" crystal due to more total internal reflection with a slight increase in consumption of rough diamonds, as well as the resulting picture stars on on the Ergneti caletti. This allows you to use stones with a height of less than 60% of the diameter.

Method-cut diamonds with caletti, including diamond cutting round shape faceted education caletti, characterized in that Colette visitvisit and polished arcuate grooves from opposite edges of the bottom faces of the diamond, with arcuate grooves have a cross-section of the angle of 41°.



 

Same patents:

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

Cleaning of amber // 2486970

FIELD: process engineering.

SUBSTANCE: invention relates to extraction and processing of fossil resins and may be used for industrial cleaning of amber. Proposed method comprises treatment of amber by organic solvent, namely, tetrahydrofuran or its water solution at content of tetrahydrofuran over 30 wt %, and flushing the amber with water. Treatment by organic solvent is carried out at 20-50°C for 3-25 minutes while flushing is performed under pressure with additional exposure to ultrasound.

EFFECT: higher quality of cleaning, simplified process.

6 cl

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

FIELD: chemistry.

SUBSTANCE: invention relates to production of amber half-stock, primarily, of minor fractions and large-size amber articles and work pieces. Proposed method consists in loading amber stock in elastic shell made from waterproof material to be sealed and placed in hydro barometric chamber. The latter is filled with fluid. Elastic shell filled with amber stock is subjected to hydrostatic compression at high fluid pressure. Note here that temperature inside said chamber is kept not higher than 120°C during the entire period of hydrostatic effects.

EFFECT: production of large-size amber articles with normal physical, chemical, aesthetic and therapeutic qualities of natural monolithic amber, recovery of industrial wastes, cheap amber half-stock.

4 cl

FIELD: process engineering.

SUBSTANCE: set of invention relates to abrasive powders intended for machining silicon ingots, to abrasive wire and to method of wire cutting. Said powder features granulometric fraction D40-D60 bearing over 15 vol % and less than 80 vol % of grains with roundness under 0.85. Abrasive wire for cutting silicon ingots comprises bearing wire containing said powder and grains binder. Proposed method of cutting silicon ingot allows making plate that feature thickness smaller than 200 mcm.

EFFECT: higher cutting efficiency.

19 cl, 2 dwg, 5 tbl

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

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

FIELD: process engineering.

SUBSTANCE: invention relates to diamond processing, in particular, by thermochemical process. Proposed method comprises applying layer of spirit glue composition onto diamond surface, said composition containing transition metal, for example, Fe, Ni or Co, and processing diamond thermally at temperature not exceeding 1000°C. To prepare spirit glue composition, powder of water-soluble salt of transition metal is used. Said powder in amount of 1-10 wt % of water solution is mixed with spirit solution of glue at salt water solution-to-glue spirit solution ratio of 1:1. Prepared mix is applied on diamond surface in 10-20 mcm-thick layer to be dried. Thermal processing of diamond is performed in two steps. Note here that, at first step, diamond is processed at 600-700°C for 1-2 min, while, at second step, it is processed at 800-1000°C for 15-30 min.

EFFECT: superhigh specific surface with nano-sized (100-200 nm) relief, expanded applications.

2 dwg, 7 ex

FIELD: process engineering.

SUBSTANCE: invention relates to crystallographic substrates and method of their finishing. Proposed method comprises defining parameters of monocrystalline body crystallographic orientation and calculating the angle of grain-boundary between selected monocrystalline body crystallographic direction and projection of crystallographic direction along the plane of monocrystalline body first outer main surface. Then, material is removed from at least a part of said first outer main surface to vary aforesaid angle.

EFFECT: production of high-quality large-size substrates.

15 cl, 9 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to processing of super hard materials, e.g. hard alloys, borazon, diamond, and may be used in diamond processing industry. Grinding is performed by grinding wheel fitted on machine tool spindle, intended for diamond grinding and furnished with diamond heads. Spindle rpm is varied in stepless manner to allow grinding wheel circumferential speed of 120-280 m/s. Billet is fed to grinding zone at 3-9 m/min along machine tool table feed direction and laterally in lateral machine tool table feed making 0.01-0.06 mm/double stroke.

EFFECT: higher processing efficiency.

2 dwg

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

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

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

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

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

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

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

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

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

FIELD: jewelry and haberdashery, in particular, construction of preferably jewelry article, such as ring, brooch, bracelet etc having detachable decorative member.

SUBSTANCE: decoration has base with profiled through opening adapted for passage of leg and loop of decorative member pivotally fixed on leg, said leg and loop having shape and sizes corresponding to those of through opening. Fastening device is equipped with blocking member. In preferable version, decoration has at least pair of interchangeable decorative members.

EFFECT: wider range of decorative articles and improved operating properties, including reliable fastening of detachable decorative member.

12 cl, 9 dwg

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