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GHI Color 4.0ct 4.5ct 5.0ct CVD Lab Grown Diamonds Yuda Crystal For Jewelry

Minimum Order Quantity : Negotiate Price : Negotiate
Packaging Details : Carton box Delivery Time : 1-7 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: GHI Clarity: VVS VS
Carat Weight: 4.0-4.99ct 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: 1-7 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:

5.0ct CVD Lab Grown Diamonds


4.5ct CVD Lab Grown Diamonds


GHI Color 4 ct lab created diamond

Product Description

GHI Color 4.0-5.0ct CVD Lab Grown Diamonds for CVD diamond jewelry


CVD Lab Grown Diamonds Description


HPHT synthetic diamonds usually contain metal co-solvent inclusions, which are black and opaque under transmitted light, and appear metallic under reflected light. This is because during the growth of HPHT diamonds, metals used as catalysts sometimes enter the diamond crystals. These co-solvent metal alloys contain elements such as iron, nickel, and cobalt. Therefore, sometimes a magnet can be used to attract synthetic diamonds with larger metal inclusions.

CVD-grown synthetic diamonds do not contain metal inclusions. But they usually contain dark graphite inclusions or other mineral inclusions, which are formed during their unique growth process. Graphite inclusions are different from metal inclusions in that they have no metallic luster.

The CVD process is very different from the formation of natural diamonds. In a vacuum chamber filled with a hot mixture of hydrocarbon gas (usually methane) and hydrogen, extremely low pressure is applied, and diamonds are produced. Under normal circumstances, heating the mixture at such low pressures will produce graphite or some other non-diamond form of carbon. But in the CVD growth chamber, some of the hydrogen is converted into hydrogen atoms, which promotes the formation of diamonds, because diamonds are more stable in this environment. The conversion of hydrogen molecules into hydrogen atoms is accomplished by the application of microwaves, electric discharges or hot wires.


Parameters of CVD Lab Grown Diamonds


CVD Lab Grown Diamonds Details
Brand Name Yuda Crystal
Name CVD Lab Grown Diamonds
Diamond Color G-I
Diamond Clarity VVS-VS
Diamond Carat Weight 4.0-5.0carat
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 - 7 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


GHI Color 4.0ct 4.5ct 5.0ct CVD Lab Grown Diamonds Yuda Crystal For Jewelry 0

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