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VVS VS Rough CVD Diamonds 16 Carat To 4 Carat Man Made Diamond

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: EFG Clarity: VVS VS SI
Carat Weight: 4-16ct 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:

VVS VS Rough CVD Diamonds


Rough CVD Diamonds 16 Carat


4 Carat Man Made Diamond

Product Description

VVS VS Clarity CVD Rough Lab Grown Diamonds Created From Cvd Diamond Seed By CVD Method


CVD Lab Grown Diamonds Description


Diamonds are the hardest material in nature.
Lab-grown rough diamonds are synthesized in a few weeks, while the development of natural diamonds takes billions of years.
In the laboratory, there are two main processes for the manufacture of lab grown rough diamonds.

1. High pressure and high temperature (HPHT)

The laboratory simulates the high temperature and pressure conditions of natural diamonds when they are formed underground. HPHT diamonds are manufactured at a pressure of 5-6 GPA (approximately the pressure produced by a commercial jet landing on a human fingertip) and a temperature of 1300-1600°C.
2. Chemical Vapor Deposition (CVD)
For a long time, people believed that diamonds could only be "man-made" under high pressure and high temperature conditions, imitating the formation of natural diamonds. The use of this method to make diamonds is now very common, mainly for the aforementioned industrial applications. However, in the late 1980s, scientists discovered how to use a method called chemical vapor deposition (CVD) to "plant" diamonds. Scientists are able to manufacture synthetic diamonds at moderate temperatures (700°C to 1300°C) and low pressures. The carbon-containing gas is pumped into the vacuum chamber, deposited on the diamond seed, and crystallized into rough laboratory-grown diamonds. The final size of the diamond depends on the time allowed to grow.


Parameters of CVD Lab Grown Diamonds


CVD Lab Grown Diamonds Details
Brand Name Yuda Crystal
Name CVD Lab Grown Diamonds
Diamond Color E-G
Diamond Clarity VVS-SI
Diamond Carat Weight 4.0-15.0carat
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


VVS VS Rough CVD Diamonds 16 Carat To 4 Carat Man Made Diamond 0

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