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SI1 SI2 HPHT Synthetic Rough Diamond 6 Carat 6.5 Carat 7 Carat

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SI1 SI2 HPHT Synthetic Rough Diamond 6 Carat 6.5 Carat 7 Carat

SI1 SI2 HPHT Synthetic Rough Diamond 6 Carat 6.5 Carat 7 Carat
SI1 SI2 HPHT Synthetic Rough Diamond 6 Carat 6.5 Carat 7 Carat SI1 SI2 HPHT Synthetic Rough Diamond 6 Carat 6.5 Carat 7 Carat SI1 SI2 HPHT Synthetic Rough Diamond 6 Carat 6.5 Carat 7 Carat

Large Image :  SI1 SI2 HPHT Synthetic Rough Diamond 6 Carat 6.5 Carat 7 Carat

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
Supply Ability: 50000carats per month

SI1 SI2 HPHT Synthetic Rough Diamond 6 Carat 6.5 Carat 7 Carat

Product Name: HPHT Synthetic Diamond Brand: Yuda Crystal
Grade: High Assortment: Good
Color: DEF Clarity: SI
Carat Weight: 6-7ct Cut: Uncut
Technology: HPHT Shape: Rough, Raw
Usage: For Cutting Lab Grown 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:

SI2 HPHT Synthetic Rough Diamond


SI1 HPHT synthetic rough diamond


HPHT 7 carat rough diamond

SI1 SI2 Clairty DEF Color 6.0 Carat To 7.0 Carat HPHT Synthetic Rough Diamond For Making Hpht Diamond Rings


Lab Grown Rough Diamonds Description


Synthetic diamond is a kind of imitation of natural mineral, which is no inferior to the original stone. Is the diamond made in the laboratory real? Of course, they are! Man made diamonds have no defects and are cleaner and harder than natural diamonds.
Synthetic diamonds are produced in the laboratory in several ways. Manufacturing them requires expensive equipment and high-quality raw materials.
Several technologies are being used to produce laboratory grown diamonds.
The first method is called HPHT or thermogravimetry (temperature and pressure). The pressure diamonds produced in this way are relatively cheap because of the low cost. The bottom line is to heat (1500 degrees) carbon at high pressure (50000 – 70000 environments) with the help of catalyst metals.
CVD is a chemical vapor deposition method. CVD diamond grown by this method is used in optical and electronic fields. Hydrocarbon gas (methane) is deposited on silicon wafer by heating (3100 degrees) or microwave radiation. The film thickness is 2-3 mm.
Explosive fusion. Graphite produces an artificial replica under the high pressure of an explosive explosion.
Ultrasonic cavitation. Under normal conditions, graphite suspension was added into organic solvent, and artificial minerals were grown under ultrasonic cavitation.
High pressure and high temperature
Chemical vapor deposition
At present, the first two methods are the most popular.


Parameters of Lab Grown Rough Diamonds

HPHT Lab Grown Diamonds Details
Brand Name Yuda Crystal
Name Rough Lab Grown Diamonds
Diamond Color D-F
Diamond Clarity SI
Diamond Carat Weight 6.0-7.0 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 - 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)


Lab Grown Rough Diamonds Introduction

HPHT is the abbreviation for high temperature and high pressure treatment, and its purpose is to change or improve the natural body color of certain types of diamonds to make them more valuable.

In the past, it was called Pegasus diamond and GE POL diamond. The reason why it is called GE Diamond is because The technology developed by GE in the United States is a new product exclusively sold by POL, a subsidiary of Israel's LKI, in 1999.

HPHT technology is to process natural diamonds at high temperature and high pressure to enhance the color grade of diamonds. In one move, it can be upgraded to 4-6 levels. However, not every diamond can be processed by this technology. It must have a J color or higher, and be free of impurities and high-clarity quality. During processing, the results cannot be predicted. In other words, it is not certain what level it can be promoted to.

At the same time, diamonds treated with HPHT may deepen or change in color to become a colored diamond.


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 $$$$$ $$$


Lab Grown Rough Diamonds Details


SI1 SI2 HPHT Synthetic Rough Diamond 6 Carat 6.5 Carat 7 Carat 0

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