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6.0ct 7.0ct CVD Rough Diamonds Uncut Unpolished Diamond For Fancy Oval Diamonds

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 Rough Diamonds Brand: Yuda Crystal
Grade: High Assortment: Good
Color: GH Clarity: VVS VS
Carat Weight: 6.0-7.0ct Cut: Uncut
Technology: CVD Shape: Rough, Raw, Rectangular
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:

7.0ct CVD Rough Diamonds


6.0ct CVD Rough Diamonds


CVD uncut unpolished diamond

Product Description

Rectangular Shape 6.0 - 7.0ct CVD Rough Diamonds For 2 Carat 2.5 Carat Fancy Oval Shape Cvd Polish Diamonds


CVD Rough Diamonds​ Description


CVD rough diamonds are real diamonds made by chemical vapor deposition(CVD) method in the laboratory.

How is the diamond production process in the laboratory?

Lab created diamonds do not need to be produced under the high temperature and high pressure conditions inside the earth like mined diamonds. It grows in a mild environment in a ground laboratory.

Laboratory grown diamond can be processed by two methods: CVD (chemical vapor deposition) or HPHT (high temperature and high pressure). Both methods needs seed. In chemical vapor deposition (CVD), the seed is placed in a plasma reactor chamber, and then a carbon-rich gas mixture is added to the seed under extremely low pressure. Then microwaves are used to heat the gas and generate plasma. When the temperature rises by several thousand degrees Celsius, the gas molecules decompose and the carbon atoms are combined with the seeds. Its operation process is to put a small piece of diamond as seed diamond into the reactor, then fill the reactor with methane, and then turn on electricity. The methane molecules are then ionized, forming a plasma. This plasma contains a large number of carbon atoms, which continuously accumulate on the diamond mother crystal. After layer by layer, lab grown diamonds composed of pure carbon atoms are formed.

High pressure and high pressure (HPHT) places the seeds under great mechanical pressure and exerting high pressure and high temperature on the existing carbon. The seed will quickly turn into a diamond with a carbon lattice and grow layer by layer within a few days until it reaches the desired carat weight.


Parameters of CVD Rough Diamonds


CVD Rough Diamonds Details
Brand Name Yuda Crystal
Name CVD Rough Diamonds
Diamond Color GHI
Diamond Clarity VVS-VS
Diamond Carat Weight 6.0-7.0carat
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 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

6.0ct 7.0ct CVD Rough Diamonds Uncut Unpolished Diamond For Fancy Oval Diamonds 0


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