Contact Us

Contact Person : Li

Phone Number : +86 371 53395413

WhatsApp : +8615225124915

Free call

Square 6mm To 8mm EF Color CVD HPHT Diamond Chemical Vapor Deposition

Minimum Order Quantity : Negotiate Price : Negotiate
Packaging Details : Carton box Delivery Time : 1-15 working days
Payment Terms : T/T, Western Union Supply Ability : 50000carats per month
Place of Origin: Zhengzhou, China Brand Name: YUDA CRYSTAL
Certification: None Model Number: YD-A+

Detail Information

Product Name: CVD Lab Grown Diamonds Brand: Yuda Crystal
Grade: High Assortment: Good
Color: EFG Clarity: VVS VS
Carat Weight: 3.0-5.0ct Cut: Uncut
Technology: CVD Shape: Rough, Raw, Square
Usage: For Cutting CVD Diamonds Component: Carbon
Hardness: Moh's 10 Scale Available Type: HPHT, CVD
Place Of Origin: Zhengzhou, China Payment Terms: 100% Payment In Advance
Payment Mode: T/T, Bank Transfer, PayPal, Western Union Delivery Time: 1-15 Working Days Depends On Quantity
Courier: DHL, FedEx, UPS, TNT, EMS Etc Packaging: As Export Standard
Customization: Welcome Polish: None
Symmetry: None Sample Order: Welcome
Treatments Applied: None Enhancement: None
High Light:

EF Color CVD HPHT Diamond


8mm chemical vapor deposition Diamond


Square 6mm raw uncut diamond

Product Description

Square Shape 6mm - 8mm EF Color Cvd Hpht Diamond For Making Round Brilliant Cut Lab Loose Diamonds


CVD Lab Grown Diamonds Description


CVD means 'Chemical Vapor Deposition'. It is a growth method for creating lab grown diamonds, and there is also HPHT (High Pressure High Temperature) method, which are currently the two most important methods in the cultivating diamond market.

Under magnified the internal inclusions of CVD diamonds are mainly sparse clouds. In addition, under the diamond observer, the diamonds glow in purple and are accompanied by layers of growth patterns, which are typical identification features of CVD diamonds.

CVD (Chemical Vapor Deposition) diamonds are based on seed diamonds. With the aid of high-purity methane, hydrogen, nitrogen and other gases, the carbon molecules in methane and diamonds are continuously accumulated on the original diamonds in a microwave oven under high pressure. After layer-by-layer diffusion, transparent diamonds of up to 10 carats can be formed. In order to make CVD diamond grow smoothly, methane with a diamond structure is usually used as a carbon source. Methane can be regarded as monoatomic diamond produced by hydrogen pressure. The quality of lab grown diamond is almost the same as that of natural diamonds, which is difficult to distinguish with the naked eye. Lab grown diamond is just like natural diamond. Its hardness, density, thermal conductivity, brightness, sparkle and fire color are almost the same as natural diamonds.


Parameters of CVD Lab Grown Diamonds


CVD Rough Diamonds Details
Brand Name Yuda Crystal
Name CVD Rough Diamonds
Diamond Color EF
Diamond Clarity VVS VS
Diamond Carat Weight 3.0-5.0carat
Diamond Cut Uncut
Technology CVD
Size Customization
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 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 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 Lab Grown Diamonds Details


Square 6mm To 8mm EF Color CVD HPHT Diamond Chemical Vapor Deposition 0

You Might Be Into These
Get in touch with us

Enter Your Message
+86 15225124915