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DEF Color VVS VS SI Clarity Round Uncut 3-4ct HPHT Lab Grown Diamonds
Lab Created Diamonds Description
Cultivation of diamond is a synthetic diamond produced by simulating the growth environment of natural diamond in the laboratory. The main methods of synthetic lab created diamonds are HPHT high pressure and high temperature method and CVD chemical vapor deposition method, and the cultivation time is about half to one month. Lab grown diamond is completely consistent with natural diamond in physical, chemical and optical properties. It has the advantages of simple production process, environmental protection (according to Frost&Sullivan report, harmful carbon emissions generated by mining diamond is 57,000 grams per carat, while lab grown diamond only releases 0.028 grams per carat), low price (about 30% of natural diamond, Positioning light luxury), changeful style and other advantages.
Parameters Of Lab Created Diamonds
| Product Name | Synthetic (Lab created) diamond |
| Material | Lab-grown |
| Color | D-H |
| Size | 35PCS/CT-5CTS/PC |
| Grade | VVS VS SI |
| Used | Jewelry (necklace,ring) |
| Application | For Cutting Lab Grown Loose Diamonds |
| Place Of Origin | Zhengzhou, China |
Characteristics Of Lab Created Diamonds
Lab-grown diamonds are chemically, optically and structurally identical to mined diamonds. What does that mean?
| The Difference Between Lab Diamond And Natural Diamond | |||
| Attribute | Lab Created Diamonds | Natural diamond | Distinction |
| Chemical composition | C(carbon) | C(carbon) | No |
| Refractive index | 2.42 | 2.42 | No |
| Relative density | 3.52 | 3.52 | No |
| Dispersion | 0.044 | 0.044 | No |
| Hardness value | 90 GPA | 90 GPA | No |
| Thermal conductivity | 2*103 W/M/K | 2*103 W/M/K | No |
| Thermal property | 0.8*10-6 K | 0.8*10-6 K | No |
| Light transmittance | DEEP UV TO FAR TR | DEEP UV TO FAR TR | No |
Resistivity | 1016 OHM-CM | 1016 OHM-CM | No |
Compressibility | 8.3*10-13 M2/N | 8.3*10-13 M2/N | No |
HPHT is the most traditional diamond synthesis method, which
simulates the growth environment of diamond. The method is to put a
seed and metal cosolvent into a small chamber inside the machine.
It then controls the temperature and pressure in its chamber to
more than 2,000 degrees Celsius and 10.34 billion parapascals per
square foot. At these high temperatures and pressures, the powder
material of the diamond dissolves in a molten metal cosolvent and
then crystallizes on the diamond seed to form a synthetic diamond
crystal. After a few weeks or a month, remove the assembly pieces
you put in earlier. The diamond crystal is purified by
electrolysis. A typical HPHT diamond rough is then obtained. After
cutting again, it is the HPHT diamond that we usually see.
This synthesis method simulates the high temperature and high
pressure growth environment of diamond, of course, its temperature
and pressure and time can not reach the growth time of natural
diamond, the resulting diamond crystal structure is different from
natural diamond -- the structure of HPHT is cubic octahedron, and
diamond is mostly octahedron. In the past, HPHT produced small
carat diamonds (especially diamond cherry), and the color of gray.
But today, with technological advances, some companies around the
world are producing HPHT diamonds of more than 10 carats, all with
excellent color clarity.
Lab Created Diamonds Details
