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8mm 10mm DEF Color Raw CVD Rough Diamond 7.0ct To 12.0ct

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8mm 10mm DEF Color Raw CVD Rough Diamond 7.0ct To 12.0ct

8mm 10mm DEF Color Raw CVD Rough Diamond 7.0ct To 12.0ct
8mm 10mm DEF Color Raw CVD Rough Diamond 7.0ct To 12.0ct 8mm 10mm DEF Color Raw CVD Rough Diamond 7.0ct To 12.0ct 8mm 10mm DEF Color Raw CVD Rough Diamond 7.0ct To 12.0ct

Large Image :  8mm 10mm DEF Color Raw CVD Rough Diamond 7.0ct To 12.0ct

Product Details:
Place of Origin: Zhengzhou, China
Certification: None
Model Number: YD-A+
Payment & Shipping Terms:
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

8mm 10mm DEF Color Raw CVD Rough Diamond 7.0ct To 12.0ct

Product Name: CVD Lab Grown Diamonds Brand: Yuda Crystal
Grade: High Assortment: Good
Color: DEF Clarity: VVS VS
Carat Weight: 7.0-12.0ct Cut: Uncut
Technology: CVD Shape: Rough, Raw
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:

CVD Rough Diamond 7.0ct


10mm CVD Rough diamond


raw rough diamond 12.0ct

Rectangular Shape 8mm - 10mm DEF Color Raw CVD Lab Rough Dimonds For Cvd Diamond Jewelry


CVD Lab Grown Diamonds Description


High temperature and high pressure (HPHT) and chemical vapor deposition (CVD) are the two most commonly used growth methods in lab grown diamonds industrial.

Specifically, the lab grown diamonds growth process is to put high-purity graphite as carbon source in the high temperature area of the growth chamber of the top press, and place natural or cultivated diamond seeds in the low temperature area. Driven by a certain temperature gradient, carbon will diffuse from the high concentration area at high temperature to the low concentration area at low temperature, and crystallize at low temperature when the seed crystal is supersaturated. Through the seed crystal, it will grow up just like the seed. Therefore, this method is also called seed temperature gradient method.

At present, metal catalysts (such as Fe, Ni, Mn, CO and their alloys) are added in the industrial growth process as catalysts (or fluxes) to reduce the growth temperature and pressure, Improve the reaction conditions and speed up the reaction rate.

Generally, after more than ten hours, the growth of lab grown diamonds is completed. However, at this time, the lab grown diamonds surface will be coated with carbon and metal catalyst, and these impurities need to be removed by pickling solution (made of 90% concentrated sulfuric acid and 10% concentrated nitric acid).


Parameters of CVD Lab Grown Diamonds


CVD Rough Diamonds Details
Brand Name Yuda Crystal
Name CVD Rough Diamonds
Diamond Color D-F
Diamond Clarity VVS-VS
Diamond Carat Weight 7.0-12.0carat
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 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 Lab Grown Diamonds Details


8mm 10mm DEF Color Raw CVD Rough Diamond 7.0ct To 12.0ct 0

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