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3.0ct 4.0ct HPHT Rough Diamonds

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3.0ct 4.0ct HPHT Rough Diamonds

3.0ct 4.0ct HPHT Rough Diamonds
3.0ct 4.0ct HPHT Rough Diamonds 3.0ct 4.0ct HPHT Rough Diamonds 3.0ct 4.0ct HPHT Rough Diamonds

Large Image :  3.0ct 4.0ct HPHT Rough Diamonds

Product Details:
Place of Origin: Zhengzhou, China
Certification: None
Model Number: YD-B
Payment & Shipping Terms:
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

3.0ct 4.0ct HPHT Rough Diamonds

Product Name: Lab Made HPHT Rough Diamonds Brand: Yuda Crystal
Grade: High Assortment: Good
Color: DEF Clarity: VS SI
Carat Weight: 3.0-4.0ct 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:

4.0ct HPHT Rough Diamonds


3.0ct HPHT Rough Diamonds


3.0 carat laboratory made diamonds

3.0-4.0ct DEF Color VS SI Mix Quality Lab Made HPHT Rough Diamonds


Lab Made HPHT Rough Diamonds Description


Laboratory-grown diamonds are grown by simulating the growth environment of natural diamonds through high-temperature and high-pressure methods or chemical meteorological deposition. Their chemical, physical, atomic, and optical properties are the same as natural diamonds; we call them "laboratory-grown diamonds."
There are two processes for laboratory-grown diamond manufacturing-chemical vapor deposition (CVD) and high pressure and high temperature (HPHT), and the rough crystals produced are different in shape.

CVD (Chemical Vapor Deposition) diamond is based on a loose natural diamond stone as the parent stone, using high-purity methane, plus hydrogen, nitrogen and other gases to assist, in a microwave oven at high pressure to make methane the same carbon as diamonds Molecules continue to accumulate on the rough diamond, and after a layer of proliferation, a transparent diamond as large as 10 carats can be formed.
Another commonly used method for cultivating diamonds is "HPHT" (high temperature and high pressure synthesis), which uses iron, nickel and other metal elements as catalysts to simulate the temperature and pressure environment produced by natural diamonds for crystal growth.

High temperature and high pressure (HPHT) diamond planting technology

As the first generation of diamond growth technology, high temperature and high pressure technology can completely simulate the growth process of natural diamonds, reproduce the reaction of the carbon layer on the ground, and convert graphite into diamonds. The growth of HPHT synthetic diamonds takes place in a small chamber of the device, which generates high pressure. In the nacelle, the raw material of diamond powder is dissolved in the molten metal flux and then crystallized on the seed crystal to form a synthetic diamond crystal. The crystallization process takes several weeks to a month or more to form one or more crystals. However, most of the synthetic diamonds produced by this method cannot reach gem level, and are usually used in drilling, cutting, aerospace, electronics, heat exchange and other fields.

At present, the popular high-temperature and high-pressure synthetic diamond equipment in the world mainly includes two side tops (belt, mainly popular in European and American countries), six side tops (unique to China) and strip split ball (Russia) or improved split ball (Gemesis company).



Parameters of Lab Made HPHT Rough Diamonds


Lab Made HPHT Rough Diamonds Details
Brand Name Yuda Crystal
Name Lab Made HPHT Rough Diamonds
Diamond Color D-F
Diamond Clarity VS-SI
Diamond Carat Weight 3.0ct - 4.0ct
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)


Lab Made HPHT 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 $$$$$ $$$



Lab Made HPHT Rough Diamonds Details

3.0ct 4.0ct HPHT Rough Diamonds 0

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