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4-15 Carat EFG VVS VS CVD Single Crystal Diamonds For Artificial Jewellery Material

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 :: CVD Rough Diamonds Color: G+
Purity: VVS VS Carat Weight: 4-15 Carat
Technology: CVD Usage: For Artificial Jewellery Material
Payment Terms: 100% Payment In Advance Payment Mode: T/T, PayPal,Bank Transfer, Western Union
Delivery Time: 1-7 Working Days Depends On Quantity Courier: DHL, UPS, FedEx, TNT, EMS Etc
Packaging: As Export Standard Hardness: Moh's 10 Scale
Cut: Uncut Shape: Square Stone,Raw
High Light:

15 Carat Single Crystal Diamonds


4 Carat Single Crystal Diamonds


EFG 4 carat lab grown diamond

Product Description

4-15 Carat EFG VVS VS CVD Single Crystal Diamonds For Artificial Jewellery Material


CVD Rough Diamonds Description


CVD cultivation of diamonds (chemical vapor deposition) is a hot topic at present. The basic principle is to deposit diamonds in a vacuum, using the highly thermal decomposition of methane gas to break down a plasma of carbon atoms. Early development of CVD technology was to create what are called diamond films, but later research has shown that diamond crystals can also grow very large particles of synthetic diamonds.

In theory, diamonds need to be formed under high pressure, but there is a gas called methane, CH4. Imagine a carbon atom with four arms, each holding four hydrogen atoms. At high temperatures and in a vacuum, methane breaks down, the bonds between carbon and hydrogen atoms break apart, and the carbon atoms bond to each other and deposit themselves on the seed, forming diamonds. CVD can grow diamonds at a rate of 0.006mm per hour and produce a diamond coated with graphite in two days. CVD technology uses vacuum technology, low pressure technology, but it also needs to be generated in high temperature environment.

Diamond synthesized by CVD technology can achieve the clarity and color of high-grade natural diamond, and another advantage is that compared with HPHT, it can produce larger diamond particles.


Parameters Of Man Made Lab Created Diamonds


Product Name Synthetic (Lab created) diamond
Technology CVD
Color EFG
Size 4CT-16CTS
Grade VVS VS
Used Polished Diamond Jewelry (necklace,ring)
Application For Cutting Lab Grown Loose Diamonds
Place Of Origin Zhengzhou, China


Man Made Lab Created Diamonds Introduction


Artificial diamond is composed of 10 to 30 nm in diameter diamond crystallization aggregation of crystal diamond, more early artificial diamond with nitrogen from the air atom into diamond crystals and light syrup in color, the improved method, after scientists now the production of synthetic diamond and natural diamond without any differences in appearance, because of the different production, The molecular structure of artificial diamond is not the complete octahedral structure of natural diamond but a complex structure, which will produce phosphorescence phenomenon. With the maturity of artificial diamond production technology, its low cost, and can produce a variety of colors of diamonds and in the jewelry market.

A very small natural diamond is placed in the center as a seed at 2300℃ at 15 to 18 atmospheres of high temperature and pressure. Around the seed diamond is a hot metal liquid, and on top of the metal solution is graphite. In this environment, the carbon atoms in the graphite will line up from the metal atoms to the diamond and form a new diamond.

In the past, synthetic diamonds and processing costs are still very high, especially in the equipment, technology, process and other aspects of the requirements are still very high, but there is a small number of synthetic diamonds on the market in the world, but there is no price advantage. But with the development of technology, synthetic diamonds are now commercially viable.

Man Made Lab Created Diamonds Details

4-15 Carat EFG VVS VS CVD Single Crystal Diamonds For Artificial Jewellery Material 0

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