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Rectangular 7mm 9mm DEF Color HPHT Rough Raw Diamond For Ring

Categories CVD Rough Diamonds
Brand Name: YUDA CRYSTAL
Model Number: YD-A+
Certification: None
Place of Origin: Zhengzhou, China
MOQ: Negotiate
Price: Negotiate
Payment Terms: 100% Payment In Advance
Supply Ability: 50000carats per month
Delivery Time: 1-15 Working Days Depends On Quantity
Packaging Details: Carton box
Product Name: HPHT Lab Grown Diamonds
Brand: Yuda Crystal
Grade: High
Assortment: Good
Color: DEF
Clarity: VVS VS
Carat Weight: 8.0-10.0ct
Cut: Uncut
Technology: HPHT
Shape: Rough, Raw
Usage: For Cutting HPHT Diamonds
Component: Carbon
Hardness: Moh's 10 Scale
Available Type: HPHT
Place Of Origin: Zhengzhou, China
Payment Mode: T/T, Bank Transfer, PayPal, Western Union
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
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Rectangular 7mm 9mm DEF Color HPHT Rough Raw Diamond For Ring

Rectangular Shape 7mm - 9mm DEF Color Rough Raw HPHT Diamond For Synthetic HPHT Diamond Ring Making


Synthetic HPHT Diamond Description


The lab grown diamonds is made by using high technology to simulate the environment in which natural diamonds are formed in the earth's crust.
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. 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.

CVD and HPHT are two main methods to make lab diamonds nowadays.

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, 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.


Parameters of Synthetic HPHT Diamond

HPHT Rough Diamonds Details
Brand NameYuda Crystal
NameHPHT Rough Diamonds
Diamond ColorD-F
Diamond ClarityVVS-SI
Diamond Carat Weight8.0-10.0carat
Diamond CutUncut
TechnologyHPHT
SizeCustomization
ShapeRaw, Square
ApplicationFor Cutting Lab Grown Loose Diamonds
Place Of OriginZhengzhou, China
Delivery Time1 - 15 Working Days Base on Order Quantity
Payment Terms100% Payment In Advance
Payment MethodsT/T, PayPal, Western Union, Bank Transfer
Shipping wayDHL, FedEx, SF Express, UPS, EMS, TNT etc
M.O.QNegotiable
Diamond TypeSynthetic(lab created)
LocationZhengzhou, China
Treatments AppliedNone
Fire Dispersion0.044(Same as Natural Diamond)
Brilliance Refraction Index2.42(Same as Natural Diamond)
Relative Density3.52(Same as Natural Diamond)
Chemical CompositionCarbon(Same as Natural Diamond)
Moh's Hardness10(Same as Natural Diamond)

Synthetic HPHT Diamond​ Introduction


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
PropertiesEarth MinedLab Created
Guaranteed Conflict-FreeNoYes
Hardness (MOHS)1010
SP3 Carbon Diamond Bonds (%)100%100%
Internal Crystal StructureFace-Centered CubicFace-Centered Cubic
Hardness Comparable2.422.42
Relative Diversity3.523.52
Color Diffusion0.0440.044
ColorVarious GradesK to D grades
Price$$$$$$$$

Synthetic HPHT Diamond Details


Cheap Rectangular 7mm 9mm DEF Color HPHT Rough Raw Diamond For Ring for sale
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