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3ct-4ct HPHT Lab Grown Diamonds DEF Color VVS VS Clarity For Jewelry

Minimum Order Quantity : Negotiate Price : Negotiate
Packaging Details : Carton box Delivery Time : 1-7 working days
Payment Terms : T/T, Western Union, PayPal, Bank Transfer Supply Ability : 50000carats per month
Place of Origin: Zhengzhou, China Brand Name: Yuda Crystal
Certification: None Model Number: RBC

Detail Information

Product Name :: HPHT Lab Grown Diamonds Color: D-H
Clarity: VVS VS SI Carat Weight: 3-4ct
Technology: HPHT Usage: For Cutting Lab Grown Diamonds
Payment Terms: 100% Payment In Advance Payment Mode: T/T, Bank Transfer, PayPal, Western Union
Delivery Time: 1-7 Working Days Depends On Quantity Courier: DHL, FedEx, UPS, TNT, EMS Etc
Packaging: As Export Standard Hardness: Moh's 10 Scale
High Light:

3ct HPHT Lab Grown Diamonds


4ct HPHT Lab Grown Diamonds


VVS def colour diamond

Product Description

3ct-4ct HPHT Lab Grown Diamonds DEF Color VVS VS Clarity For Jewelry


Lab Created Diamonds Description


Cultivated diamond is synthesized by artificial simulation of natural diamond crystallization conditions and growth environment, and natural diamond has exactly the same physical, chemical and optical properties. Production time is perhaps the biggest difference between the two types of diamonds, with natural diamonds taking hundreds of millions of years to form and cultured diamonds taking just a few weeks to produce.

Scientists have mastered how to grow a diamond in a laboratory, which is much cheaper than mining natural diamonds.

1. High pressure high Temperature method (HPHT)

Growing diamonds requires an indispensable element: carbon (C). In the process of growing HPHT diamonds, pure carbon powder is compressed into a growth capsule and then placed in a incubation chamber at pressures of 5-6 gpa and extremely high temperatures (up to 1300-1600°C) day in and day out. Eventually the carbon atoms join together to form a diamond crystal. Many large diamonds over 10 carats can be produced in one go in less than two weeks.

2.Chemical vapor Deposition (CVD)

Breeding process of chemical vapor deposition method is as follows: first, place a piece of diamond chips in a vacuum box, the next in the chamber filled with a mixture of hydrogen and methane gas, the gas provides a carbon atom, under the pressure of certain heating, until the gasification of carbon atoms on the thin layers and layers of sedimentary, like rain, forming uniform diamond coating. It takes nearly a month to grow a one-carat CVD diamond crystal.


Parameters Of Lab Created Diamonds


Product Name Synthetic (Lab created) diamond
Material Lab-grown
Color D-H
Used Jewelry (necklace,ring)
Application For Cutting Lab Grown Loose Diamonds
Place Of Origin Zhengzhou, China


Characteristics Of Lab Created Diamonds


Lab-grown diamonds are chemically, optically and structurally identical to mined diamonds. What does that mean?


The Difference Between Lab Diamond And Natural Diamond
Attribute Lab Created Diamonds Natural diamond Distinction
Chemical composition C(carbon) C(carbon) No
Refractive index 2.42 2.42 No
Relative density 3.52 3.52 No
Dispersion 0.044 0.044 No
Hardness value 90 GPA 90 GPA No
Thermal conductivity 2*103 W/M/K 2*103 W/M/K No
Thermal property 0.8*10-6 K 0.8*10-6 K No
Light transmittance DEEP UV TO FAR TR DEEP UV TO FAR TR No


1016 OHM-CM

1016 OHM-CM



8.3*10-13 M2/N

8.3*10-13 M2/N



From a scientific point of view, cultivated diamonds are exactly the same as natural diamonds, the only difference being where they are formed.


Lab Created Diamonds Details


3ct-4ct HPHT Lab Grown Diamonds DEF Color VVS VS Clarity For Jewelry 0

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