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[China]
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Address: ROOM 1524, 15TH FLOOR, NO.56 ZIJINGSHAN ROAD, GUANCHENG DISTRICT, ZHENGZHOU, HENAN, CHINA
Contact name:Pang
Henan Yuda Crystal Co.,Ltd |
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Square Shape EF Color 11mm - 13mm E F G H I Color Raw Uncut Cvd Diamonds For Cutting And Polishing Loose Diamonds
CVD Rough Diamonds Description
Laboratory-grown diamonds, also known as laboratory-made diamonds,
man-made diamonds and synthetic diamonds, are pure carbon diamonds
that simulate the natural growth process of the earth under
strictly controlled laboratory conditions.
CVD (Chemical Vapor Deposition) diamond is based on a loose natural
diamond stone as the parent stone, using high-purity methane, plus
hydrogen, nitrogen and other gases to assist, in a microwave oven
at high pressure to make methane the same carbon as diamonds
Molecules continue to accumulate on the rough diamond, and after a
layer of proliferation, a transparent diamond as large as 10 carats
can be formed.
HTHP synthetic diamonds are often cubes, octahedrons, and the
combination of the two; the color is often yellow, yellowish brown,
and the internal features such as colored bands and metal
inclusions are common. The unmelted metal inclusions are
needle-shaped, flake-shaped, and small columnar. Or irregular
appearance with metallic luster, which makes synthetic diamonds
magnetic.
Synthetic diamonds usually have no fluorescence under long-wave ultraviolet, and often have yellow, green-yellow, orange-yellow fluorescence under short-wavelength. Synthetic diamonds have characteristic banding under ultrashort-wave ultraviolet or cathode rays. Different growth areas show different colors of fluorescence.
Parameters of CVD Rough Diamonds
| CVD Rough Diamonds Details | |
| Brand Name | Yuda Crystal |
| Name | CVD Rough Diamonds |
| Diamond Color | EFGHI |
| Diamond Clarity | VVS-SI |
| Diamond Carat Weight | 8.0-10.0carat |
| Diamond Cut | Uncut |
| Technology | CVD |
| Size | 5.0-7.0mm,11mm 13mm |
| Shape | Raw, Square |
| 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 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 Lab Grown Diamonds and natural diamonds?
There is no obvious difference between the 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
