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DEF Color VVS VS SI Clarity HPHT Lab Grown Diamonds Round Uncut 3-4ct

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: DEF
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:

VVS Clarity HPHT Lab Grown Diamonds


4CT hpht treated diamonds


3CT hpht treated diamonds

Product Description

DEF Color VVS VS SI Clarity Round Uncut 3-4ct HPHT Lab Grown Diamonds


Lab Created Diamonds Description


Cultivation of diamond is a synthetic diamond produced by simulating the growth environment of natural diamond in the laboratory. The main methods of synthetic lab created diamonds are HPHT high pressure and high temperature method and CVD chemical vapor deposition method, and the cultivation time is about half to one month. Lab grown diamond is completely consistent with natural diamond in physical, chemical and optical properties. It has the advantages of simple production process, environmental protection (according to Frost&Sullivan report, harmful carbon emissions generated by mining diamond is 57,000 grams per carat, while lab grown diamond only releases 0.028 grams per carat), low price (about 30% of natural diamond, Positioning light luxury), changeful style and other advantages.


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



HPHT is the most traditional diamond synthesis method, which simulates the growth environment of diamond. The method is to put a seed and metal cosolvent into a small chamber inside the machine. It then controls the temperature and pressure in its chamber to more than 2,000 degrees Celsius and 10.34 billion parapascals per square foot. At these high temperatures and pressures, the powder material of the diamond dissolves in a molten metal cosolvent and then crystallizes on the diamond seed to form a synthetic diamond crystal. After a few weeks or a month, remove the assembly pieces you put in earlier. The diamond crystal is purified by electrolysis. A typical HPHT diamond rough is then obtained. After cutting again, it is the HPHT diamond that we usually see.
This synthesis method simulates the high temperature and high pressure growth environment of diamond, of course, its temperature and pressure and time can not reach the growth time of natural diamond, the resulting diamond crystal structure is different from natural diamond -- the structure of HPHT is cubic octahedron, and diamond is mostly octahedron. In the past, HPHT produced small carat diamonds (especially diamond cherry), and the color of gray. But today, with technological advances, some companies around the world are producing HPHT diamonds of more than 10 carats, all with excellent color clarity.


Lab Created Diamonds Details


DEF Color VVS VS SI Clarity HPHT Lab Grown Diamonds Round Uncut 3-4ct 0

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