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5mm To 7mm DEF Color Rough CVD Diamond Rectangular Shape

Minimum Order Quantity : Negotiate Price : Negotiate
Packaging Details : Carton box Delivery Time : 1-15 working days
Payment Terms : T/T, Western Union, PayPal, Bank Transfer 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: DEF Clarity: VVS VS
Carat Weight: 4.0-7.0ct 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:

7mm Rough CVD Diamond


6mm Rough CVD Diamond


5mm DEF Color Diamond

Product Description

Rectangular Shape 5mm - 7mm DEF Color Rough CVD Diamond Price Per Carat


CVD Lab Grown Diamonds Description


The laboratory-grown diamonds are grown in the laboratory, they are composed of carbon atoms, have the same physical properties and chemical composition as natural diamonds, and have fewer impurities and higher purity than natural diamonds. And it's cheaper.

There are two techniques for growing diamond in the laboratory, one is the high temperature and high pressure method. This method is the most widely used, but this process will use a catalyst to mix the diamond with impurities, so most diamonds are used in industrial fields. The other is chemical vapor deposition. This method can obtain high-purity diamond without a catalyst.

What is the essential difference between natural diamonds and cultivated diamonds, mainly in the following points:

1. Formation time

Natural diamonds are formed under high temperature and high pressure due to geological reasons, and it takes tens of thousands or even tens of millions of years to produce. Cultivated diamonds are cultivated in about one to three weeks.

2. Crystal shape

The formation temperature of natural diamonds and laboratory-grown diamonds is almost the same, but natural diamonds will grow into octahedral crystals, while lab diamonds can grow into crystals that contain both octahedrons and cubes.

3. Color

Natural diamonds are colorless, light yellow and other colors. At present, better quality lab diamonds can also achieve colorless or light brown, which is almost unrecognizable to the naked eye.


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 4.0-7.0carat
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 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


5mm To 7mm DEF Color Rough CVD Diamond Rectangular Shape 0

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