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E F Color VVS VS 12Ct 12.5Ct 13Ct CVD Rough Diamonds For 4 Carat Polish Diamond

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
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
Carat Weight: 12.0-13.0ct 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:

13Ct CVD Rough Diamonds


12.5Ct CVD Rough Diamonds


12Ct big uncut diamond

Product Description

Square Shape E F Color VVS VS Clarity 12.0 Carat - 13.0 Carat CVD Rough Diamonds For Making 4carat Lab Grown Polish Diamond


CVD Rough Diamonds Description


Diamond is known as the hardest material in the world. According to the Mohs hardness scale, it is divided into 10 grades, and diamond is the highest grade. From the day when people know that diamond is composed of pure carbon, there are more and more researches on Lab Grown Diamonds. Now Lab Grown Diamonds industry has developed rapidly and is widely used in various industries.
There are two main methods to make lab grown diamonds. One is called HPHT(High Temperature and High Pressure) and another is CVD(Chemical Vapor Deposition)method.
High temperature and high pressure synthetic diamond technology originated in the 1950s, initially mainly used in aviation and military industry, in the last decade gem grade synthetic diamond in quality and cost has reached the level of marketization.

HPHT lab grown rough diamonds is produced by simulating the crystallization process of natural diamonds. When natural diamonds are formed in natural environment, there are often other elements mixed in, which makes some natural diamonds not completely transparent and will show specific colors. For example, some diamonds have a little pink, some with a little blue, some with a little bit of light yellow. Lab grown diamonds grow in the laboratory, which are less impurities than natural diamonds, so the purity and transparency will be higher.


Parameters of CVD Rough Diamonds


CVD Rough Diamonds Details
Brand Name Yuda Crystal
Name CVD Rough Diamonds
Diamond Color EF
Diamond Clarity VVS-VS
Diamond Carat Weight 12.0-13.0carat
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 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 $$$$$ $$$


CVD Rough Diamonds Details


E F Color VVS VS 12Ct 12.5Ct 13Ct CVD Rough Diamonds For 4 Carat Polish Diamond 0

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