GHI Color 4.0-5.0ct CVD Lab Grown Diamonds for CVD diamond jewelry
CVD Lab Grown Diamonds Description
HPHT synthetic diamonds usually contain metal co-solvent
inclusions, which are black and opaque under transmitted light, and
appear metallic under reflected light. This is because during the
growth of HPHT diamonds, metals used as catalysts sometimes enter
the diamond crystals. These co-solvent metal alloys contain
elements such as iron, nickel, and cobalt. Therefore, sometimes a
magnet can be used to attract synthetic diamonds with larger metal
inclusions.
CVD-grown synthetic diamonds do not contain metal inclusions. But
they usually contain dark graphite inclusions or other mineral
inclusions, which are formed during their unique growth process.
Graphite inclusions are different from metal inclusions in that
they have no metallic luster.
The CVD process is very different from the formation of natural
diamonds. In a vacuum chamber filled with a hot mixture of
hydrocarbon gas (usually methane) and hydrogen, extremely low
pressure is applied, and diamonds are produced. Under normal
circumstances, heating the mixture at such low pressures will
produce graphite or some other non-diamond form of carbon. But in
the CVD growth chamber, some of the hydrogen is converted into
hydrogen atoms, which promotes the formation of diamonds, because
diamonds are more stable in this environment. The conversion of
hydrogen molecules into hydrogen atoms is accomplished by the
application of microwaves, electric discharges or hot wires.
Parameters of CVD Lab Grown Diamonds
| CVD Lab Grown Diamonds Details |
| Brand Name | Yuda Crystal |
| Name | CVD Lab Grown Diamonds |
| Diamond Color | G-I |
| Diamond Clarity | VVS-VS |
| Diamond Carat Weight | 4.0-5.0carat |
| Diamond Cut | Round and fancy cut |
| Technology | CVD |
| Size | Customization |
| Shape | Round and fancy cut |
| Application | For Cutting Lab Grown Loose Diamonds |
| Place Of Origin | Zhengzhou, China |
| Delivery Time | 1 - 7 Working Days Base on Order Quantity |
| Payment Terms | 100% Payment In Advance |
| Payment Methods | T/T, PayPal, Western Union, Bank Transfer |
| Shipping way | DHL, FedEx, SF Express, UPS, EMS, TNT etc |
| M.O.Q | Negotiable |
| Diamond Type | Synthetic(lab created) |
| Location | Zhengzhou, China |
| Treatments Applied | None |
| Fire Dispersion | 0.044(Same as Natural Diamond) |
| Brilliance Refraction Index | 2.42(Same as Natural Diamond) |
| Relative Density | 3.52(Same as Natural Diamond) |
| Chemical Composition | Carbon(Same as Natural Diamond) |
| Moh's Hardness | 10(Same as Natural Diamond) |
CVD Lab Grown Diamonds Introduction
Natural diamonds are created by nature and are the result of high
temperature and pressure formed over billions of years. The Rough
Lab Grown Diamonds are produced in the laboratory, usually in a few
weeks. The chemical difference between the two is same.
So how do you distinguish between Rough Lab Grown Diamonds and
natural diamonds?
There is no obvious difference between the Rough Lab Grown Diamonds
and natural diamonds. Even professional gemologists need special
equipment to identify them. By zooming in, professionals will be
able to discern subtle contrasts in diamond inclusions grown and
mined in the laboratory.
| The Difference Between Lab Diamond And Natural Diamond |
| Properties | Earth Mined | Lab Created |
| Guaranteed Conflict-Free | No | Yes |
| Hardness (MOHS) | 10 | 10 |
| SP3 Carbon Diamond Bonds (%) | 100% | 100% |
| Internal Crystal Structure | Face-Centered Cubic | Face-Centered Cubic |
| Hardness Comparable | 2.42 | 2.42 |
| Relative Diversity | 3.52 | 3.52 |
| Color Diffusion | 0.044 | 0.044 |
| Color | Various Grades | K to D grades |
| Price | $$$$$ | $$$ |
CVD Lab Grown Diamonds Details
