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VS1 SI2 No Blue No Grey Rough Diamonds HPHT 3.0ct 4.0ct For Jewelry

Minimum Order Quantity : Negotiate Price : Negotiate
Packaging Details : Carton box Delivery Time : 3-7 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: HPHT Rough Lab Diamonds Brand: Yuda Crystal
Grade: High Assortment: Good
Color: DEF Clarity: VS SI
Carat Weight: 3.0-4.0carat 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:

VS1 SI2 No Grey Rough Diamonds


No Grey Rough Diamonds 4.0ct


No Blue Rough Diamonds 3.0ct

Product Description

3.0-4.0ct VS1-SI2 Full White No Blue No Grey Tinch HPHT Rough Lab Diamonds For Making Carat Diamonds


HPHT Rough Lab Diamonds Description


The laboratory cultivation of diamonds is the use of high technology to simulate the environment in which natural diamonds are formed in the earth's crust, and layer by layer of carbon atoms to form rough stones. There is no difference between these two types of diamonds.
Although synthetic diamonds are manufactured in factories, their chemical and physical properties are very close to natural diamonds.

In the 1950s, scientists made diamonds in the laboratory for the first time. However, the diamonds manufactured at that time were too small to be suitable for jewelry. By the mid-1990s, people began to make larger gem-quality crystals, and they have continued to this day. Nowadays, more and more companies are engaged in synthetic diamond manufacturing business. Many countries and regions are manufacturing synthetic diamonds for jewelry and industrial purposes.

In some cases, trained gemologists can identify diamonds manufactured and processed by chemical vapor deposition (CVD) or high pressure high temperature (HPHT) by using standard gem testing equipment. But sometimes, gemologists need to use advanced scientific instruments to test diamonds in order to complete the identification.

The traditional diamond manufacturing method is called the high pressure high temperature (HPHT) method. It uses a device to simulate the high pressure and high temperature conditions of natural diamonds when it is formed underground, and uses carbon materials in the device to produce synthetic diamonds.

A relatively new method called chemical vapor deposition (CVD) is to inject carbon-containing gas into a vacuum chamber and deposit its crystals on synthetic diamond seeds. This method requires lower temperature and lower pressure than the high-pressure high-temperature method. Both methods are currently very popular diamond manufacturing methods. The initial equipment cost of using the chemical vapor precipitation method to manufacture diamonds is lower than that of the high-pressure and high-temperature method, but the diamonds manufactured using this method require subsequent processing to improve the color.

Some people may treat laboratory-made diamonds as imitations, but this is not right. Real diamond imitations, such as synthetic zirconia or synthetic moissanite, just look like diamonds, but their chemical and physical properties are completely different.


Parameters of HPHT Rough Lab Diamonds


HPHT Rough Lab Diamonds Details
Brand Name Yuda Crystal
Name Rough Lab Grown Diamonds
Diamond Color D-F
Diamond Clarity SI2+
Diamond Carat Weight 3.0-4.0carat
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 - 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)


HPHT Rough Lab 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 $$$$$ $$$



HPHT Rough Lab Diamonds Details


VS1 SI2 No Blue No Grey Rough Diamonds HPHT 3.0ct 4.0ct For Jewelry 0

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