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4 Carat Loose Lab Created Diamond Lab Grown 2.5 Carat Diamond

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: Lab Created Rough Diamonds Brand: Yuda Crystal
Grade: High Assortment: Good
Color: DEF Clarity: VVS VS SI
Carat Weight: 2.5-4.0ct 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 Loose Lab Created Diamond


HPHT lab grown 2.5 carat diamond


4 carat lab created diamond

Product Description

2.5-4.0 Ct DEF Color Raw Lab Created Rough Diamonds For Cutting Carat Loose Diamonds


Lab Created Rough Diamonds Description


Both natural diamond and cultivated diamond are pure carbon crystals, and their physical, chemical, crystal structure and optical properties are exactly the same.

How are diamonds made?

1. high pressure high temperature process (HPHT)

In the laboratory or factory to create high pressure and high temperature environment to produce diamonds, that is to imitate the formation conditions of natural diamonds in the depths of the earth. In the growth chamber, the carbon source decomposes in the molten metal, and the carbon atoms gather on a very small cultivated or natural diamond seed through the metal to form a unique cultivated diamond crystal.

2. chemical vapor deposition (CVD)

Diamonds are produced in a laboratory vacuum using carbon rich gases such as methane. The process of CVD is to decompose methane into carbon and hydrogen atoms, and then deposit them on diamond seeds to form square and flat diamond crystals.

How long does it take to make a diamond?

It usually takes weeks to make diamonds in the laboratory. Compared with the millions or even billions of years of natural diamond formation in the depths of the earth, this time can be said to be very short.

It is worth mentioning that, like natural diamonds, cultivated diamonds can be artificially treated to change color, or to improve their positive appearance and clarity.

Due to the different formation conditions, the nature of natural diamonds and cultivated diamonds are also different. However, natural diamonds grow into octahedral crystals (eight equilateral triangular facets), while cultivated diamonds can grow into both octahedral and cubic crystals (six square facets).


Parameters of Lab Created Rough Diamonds


Lab Created Rough Diamonds Details

Brand Name Yuda Crystal
Name Lab Created Rough Diamonds
Diamond Color D-F
Diamond Clarity VS-SI
Diamond Carat Weight 2.5-4.0 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 - 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 Created 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 Created Rough Diamonds Details


4 Carat Loose Lab Created Diamond Lab Grown 2.5 Carat Diamond 0

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