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4.0ct 5.0ct DEF VVS VS Man Made Diamonds

China Henan Yuda Crystal Co.,Ltd certification
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4.0ct 5.0ct DEF VVS VS Man Made Diamonds

4.0ct 5.0ct DEF VVS VS Man Made Diamonds
4.0ct 5.0ct DEF VVS VS Man Made Diamonds 4.0ct 5.0ct DEF VVS VS Man Made Diamonds 4.0ct 5.0ct DEF VVS VS Man Made Diamonds

Large Image :  4.0ct 5.0ct DEF VVS VS Man Made Diamonds

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, PayPal, Bank Transfer
Supply Ability: 50000carats per month

4.0ct 5.0ct DEF VVS VS Man Made Diamonds

Product Name: Man Made Rough Diamonds Brand: Yuda Crystal
Grade: High Assortment: Good
Color: DEF Clarity: VVS VS
Carat Weight: 4.0-5.0ct Cut: Uncut
Technology: HPHT Shape: Rough, Raw
Usage: For Cutting Lab Grown Polished 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:

VVS VS Man Made Diamonds


5.0ct DEF man made diamonds


4.0ct human made diamonds

4.0-5.0ct DEF Color VVS VS Clarity Man Made Rough Diamonds For Making 2 Carat Loose Diamonds


Man Made Rough Diamonds Description


Synthetic diamonds are made via HPHT or CVD methods nowadays.

High temperature and high pressure technology fully simulates the growth process of natural diamond, reproduces the reaction of carbon layer on the ground and converts graphite into diamond. High temperature and high pressure method is also called seed catalyst method. Graphite is a low pressure stable phase, and diamond is a high pressure stable phase. The transformation from graphite to diamond requires very high pressure and temperature conditions, which generally requires a pressure and temperature of 10 GPa and above 3000℃. If there are metal catalysts (such as Fe, Ni, Mn, CO and their alloys), the temperature and pressure conditions required for graphite to become diamond will be greatly reduced. Therefore, metal catalysts are involved in the synthesis of diamond by high temperature and high pressure method at present. As a solvent, the metal catalyst is between the carbon source (usually graphite) and the diamond seed. The carbon source is at the high temperature end and the seed crystal is at the low temperature end. Because the solubility of the carbon source at the high temperature end is greater than that at the low temperature end, the solubility difference caused by the temperature difference becomes the driving force for the diffusion of the carbon source from the high temperature end to the low temperature end. The carbon source gradually precipitates at the seed crystal and the diamond crystal grows up gradually. Because the driving force of crystal growth is caused by temperature difference, this method is also called temperature difference method.

Synthetic diamonds usually have no fluorescence under long wavelength ultraviolet, but yellow, green yellow and orange yellow fluorescence under short wavelength. Synthetic diamonds have characteristic banding phenomenon under ultra short wavelength ultraviolet or cathode ray, and different growth areas show different color fluorescence banding.


Parameters of Man Made Rough Diamonds


Man Made Rough Diamonds Details
Brand Name Yuda Crystal
Name Man Made Rough Diamonds
Diamond Color D-F
Diamond Clarity VVS-SI1
Diamond Carat Weight 4.0-5.0 carat
Diamond Cut Uncut
Technology HPHT
Size 5.0-15.0mm
Shape Raw
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)


Man Made 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 $$$$$ $$$



Man Made Rough Diamonds Details


4.0ct 5.0ct DEF VVS VS Man Made Diamonds 0

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