Personalised grown gem diamond

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

 

The invention relates to artificial diamond jewelry, which can be correlated (identified with a particular person or animal.

Known precious stone, especially a diamond containing internal channels, made using laser drilling, filled with substrates, formed from the remains of the cremation of human or animal [WO 2004/076058, 2004]. These substrates obtained by mixing the ashes of animal origin with lead oxide, chloride and bromide of sodium, have a glassy structure and a refractive index close to the refractive index of diamond. The resulting diamond is visually indistinguishable from the whole.

However, after fabrication of the diamond, personified as shown in WO 2004/076058, it is impossible to verify and confirm the connection of a diamond with a particular person or animal.

Known locally grown diamond containing carbon, derived from a human or animal. To identify on the verge received a diamond laser put individual numbers assigned to the remains of animal origin [US 2003017932, 2003]. For the synthesis of diamond by US 2003017932 remains of a human or animal kramarow at a temperature of 1000-1800°F, the resulting carbon purified and used for growing diamond.

However, the use of the remains of a deceased person in the image quality is as a source of carbon is not always acceptable from an ethical side; cremation in the conditions necessary for the extraction of carbon and non-conventional technologies, it is not always possible.

The closest to the essential features of the claimed is grown personalized diamond jewelry, including carbon, a product of the carbonization of hair, and tokens representing a set of metals, usually contained in the hair [RU 2282584, 2006, bull. No. 24]. These metals strontium, cadmium, tin, barium, lead and bismuth are part of the hair and are stored in the product of carbonization. Each individual characteristic of a certain content of these metals. It can be defined in the hair, which is the starting material for producing personalized diamond, the product of its carbonation and in the grown diamond. Thus, the personification of the diamond in EN 2282584 can be controlled both at the stage of its manufacture, and the finished product.

However, it is known that the coefficient of capture various impurities surface of a growing crystal is significantly different from one another and depends on the quality of the material used and on the conditions of crystallization.

Accordingly, the occurrence of these metals in the crystal diamond may not be proportional to their content in the initial product of the carbonization of the hair, i.e. the ratio of their concentration is in the initial charge, include the product of carbonization hair, and grown from her diamond might not be preserved. As mentioned above, the metals contained in the hair of each individual, the identification of the grown diamond on this marker becomes difficult.

Technical result achieved in the present invention is to improve the accuracy of the identification of personalized diamond.

This technical result is achieved by the fact that personalized jewelry diamond grown from a mixture comprising carbon, a product of the carbonization of the material provided by the customer, powder spectral pure graphite and marker, as a token contains at least two elements selected from the group of lanthanides, introduced in the grown diamond arbitrarily set the ratio in the amount of from 0.01 to 10 mcg/g

The group of lanthanides has 15 elements having from 1 to 7 isotopes, with atomic weight of 138 (lanthanum) to 176 (lutetium). Except promethium, they are not radioactive. Physico-chemical properties of lanthanides are similar, and these items are available as individual substances and compounds.

As a token of personalized diamond can be taken any combination of pairs of the lanthanides, for example a pair of erbium (Er) and dysprosium (Dy), dysprosium and holmium (Ho), holmium is ytterbium (Yb), etc. you can also use combinations of the three lanthanides, such as Gd, Dy, and But four, five, etc.

These markers can be introduced into the mixture for the growth of synthetic diamonds in any predetermined ratio of nitric acid solutions of salts of these elements.

As the source material provided by the customer can be found in hair, nail human hair or claws of an animal, part of the other tissues (e.g., umbilical cord), the ashes after the cremation of human or animal and the like.

Carbonation hair (or other parts) of a person or animal is carried out by thermolysis in the absence of oxygen at a temperature of 400-600°C, followed by overheating up to 700-800°C. the Product of carbonization contains up to 99% of carbon.

Diamond jewelry has grown in the growth cell of the high-pressure apparatus as described in the book Chepurov A.I., Fedorov A.I., V.M. Sanin, "Experimental modeling of processes of alasoorituse", Novosibirsk, 1997, pp.8-20. Spent growing single-crystal diamond jewelry purity up to 3 carats.

Example.

Organic material provided by the customer, in the form of strands of hair weighing about 1 g was carbonizable by thermolysis when raising the temperature of 400-600°C in the absence of oxygen. The product of thermolysis overheat (progulivali) in the absence of oxygen to 750°C. From the product of the carbonization, containing 98-99% of carbon, took about 5 mg, was mixed with powder of spectral pure graphite in a ratio of 1:40. The mixture of powders was Ngapali 0.01 ml of a mixture of nitric acid solutions introduced lanthanides markers. The resulting suspension was dried under an infrared lamp to dryness at a temperature of 80±1°C.

The dried mixture of graphite powder with the product of carbonization and put lanthanide-markers were placed in cell growth and has grown diamond single crystal from the melt by way of recrystallization on the seed as described in the monograph Aigebra and other

Got jewelry faux diamond weighing approximately one carat (0.2 g).

Content markers in diamond were determined by mass spectrometry with laser sampling. The determination results are presented in the table and on the spectra (Fig.1-3).

Table
The number of typed markers and their contents in artificial diamonds
ExperienceMarkersEgGdDyButErYbLu
1 counter.Introduced in SE*.%-------
Found, µg/g<0,002<0,001<0,001<0,001<0,002<0,002<0,001
2Introduced in the SE.%----0,050,05-
Found, µg/g<0,002<0,001<0,001<0,001of 5.45,2<0,001
3Introduced in DPP,%-0,005%0,01%0,01% -0,005%0,01%
Found, µg/g<0,0020,100,230,25<0,0010,200,45
* GP - graphite powder mixed with carbonization organic material.

As can be seen from the table, in the case where the markers are not added (control experiment 1), the diamond contains a background (natural) number of lanthanide (not over 0.002 µg/g). With the introduction of markers (experiments 2 and 3) their content in diamond is determined by the spectral; it is at least two orders of magnitude higher than background.

Figure 1-3 shows the spectra of artificial diamonds that do not contain markers (figure 1), and two diamonds obtained in experiment 2 (figure 2) and in experiment 3 (figure 3).

Mass spectrometric identification of the requested diamond possible at any moment of its existence. In addition, to obtain the inventive diamond any suitable material provided by the customer.

Personalized diamond jewelry, grown from a mixture comprising carbon, a product of the carbonization of the material provided by the customer, powder spectral pure graphite and marker, ex is different, however, as a token it contains at least two elements selected from the group of lanthanides, taken arbitrarily set the ratio in the amount of from 0.01 to 10 μg/year



 

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