Rectangular Shape GHI Color 8.0-9.0 Carat CVD Rough Diamonds For
2.5ct Cvd Diamond Enagement Ring Making
CVD Rough Diamonds Description
Lab grown rough diamonds include HPHT rough diamonds and CVD rough
diamonds. Both HPHT and CVD are the two main methods to make lab
grown rough diamonds.
How are lab grown rough diamonds made? Let's see the below two main methods which can make lab grown
rough diamonds.
1. High pressure high temperature process (HPHT)
In the laboratory to create a high pressure and high temperature
environment to produce lab grown diamonds, that is to imitate the
formation conditions of mined diamonds in the depths of the earth.
In the growth chamber, the carbon source decomposes in the molten
metal, and the carbon atoms gather on a very small lab grown or
mined diamond seed through the metal to form a unique lab created
rough diamonds.
2. Chemical vapor deposition (CVD)
Lab grown diamonds are produced in a laboratory vacuum using carbon
rich gases such as methane. The process of CVD is to decompose
methane into carbon and hydrogen atoms, and then deposit them on
diamond seeds to form square and flat lab grown diamond crystals.
How long does it take to make a lab grown diamond?
It usually takes weeks to make diamonds in the laboratory. Compared
with the millions or even billions of years of mined diamond
formation in the depths of the earth, it's very short for creating
lab grown diamonds.
Due to the different formation conditions, the nature of mined
diamonds and cultivated diamonds are also different. Natural
diamonds grow into octahedral crystals (eight equilateral
triangular facets), while cultivated diamonds can grow into both
octahedral and cubic crystals (six square facets).
Parameters of CVD Rough Diamonds
| CVD Rough Diamonds Details |
| Brand Name | Yuda Crystal |
| Name | CVD Rough Diamonds |
| Diamond Color | GHI |
| Diamond Clarity | VVS-SI |
| Diamond Carat Weight | 8.0-9.0carat |
| Diamond Cut | Uncut |
| Technology | CVD |
| Size | Customization |
| Shape | Raw, Rectangular |
| 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) |
CVD Rough 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 Rough Diamonds Details
