VVS VS Clarity HPHT Rough Lab Grown Diamonds Created From HPHT
Diamond Seed By HPHT Method
HPHT Lab Grown Diamonds Description
Diamonds are the hardest material in nature.
Lab-grown rough diamonds are synthesized in a few weeks, while the
development of natural diamonds takes billions of years.
In the laboratory, there are two main processes for the manufacture
of lab grown rough diamonds.
1. High pressure and high temperature (HPHT)
The laboratory simulates the high temperature and pressure
conditions of natural diamonds when they are formed underground.
HPHT diamonds are manufactured at a pressure of 5-6 GPA
(approximately the pressure produced by a commercial jet landing on
a human fingertip) and a temperature of 1300-1600°C.
2. Chemical Vapor Deposition (CVD)
For a long time, people believed that diamonds could only be
"man-made" under high pressure and high temperature conditions,
imitating the formation of natural diamonds. The use of this method
to make diamonds is now very common, mainly for the aforementioned
industrial applications. However, in the late 1980s, scientists
discovered how to use a method called chemical vapor deposition
(CVD) to "plant" diamonds. Scientists are able to manufacture
synthetic diamonds at moderate temperatures (700°C to 1300°C) and
low pressures. The carbon-containing gas is pumped into the vacuum
chamber, deposited on the diamond seed, and crystallized into rough
laboratory-grown diamonds. The final size of the diamond depends on
the time allowed to grow.
Parameters of HPHT Lab Grown Diamonds
| HPHT Lab Grown Diamonds Details |
| Brand Name | Yuda Crystal |
| Name | HPHT Lab Grown Diamonds |
| Diamond Color | DEF |
| Diamond Clarity | VVS-SI |
| Diamond Carat Weight | 4.0-15.0carat |
| Diamond Cut | Round and fancy cut |
| Technology | HPHT |
| Size | Customization |
| Shape | Round and fancy cut |
| Application | For Cutting Lab Grown Loose Diamonds |
| Place Of Origin | Zhengzhou, China |
| Delivery Time | 1 - 15 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) |
HPHT 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 | $$$$$ | $$$ |
HPHT Lab Grown Diamonds Details
