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2.0-2.5 Ct HPHT DEF Colour Diamond Lab Created Diamond Raw Stones

Minimum Order Quantity : Negotiate Price : Negotiate
Packaging Details : Carton box Delivery Time : 1-15 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

Diamond Type: Synthetic (lab Created) Diamond Clarity: VVS,VS,SI
Size: 2.0-2.5 Ct Color: D,E,F
Technology: HPHT Material: Carbon
Usage: Jewellery,for Polishing Hardness: 10.0 Mohs Scale
Shape: Round Shape,Round Uncut Payment Term: 100% In Advance
Payment Mode: T/T, Bank Transfer, PayPal, Western Union Packaging: As Export Standard
Delivery Time: 1-15 Working Days Depends On Quantity Courier: DHL, FedEx, UPS, TNT, EMS Etc
Sample Order: Welcome Treatments Applied: None
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2.5 Ct HPHT DEF Colour Diamond


2.0 Ct HPHT DEF Colour Diamond


HPHT 2.5 Ct Lab Created Diamond

Product Description

2.0-2.5 ct HPHT DEF color rough diamond lab created diamond raw stones for sale




As we know that there are two methods for producing lab grown diamonds, high temperature and high pressure and cvd. Which of these two methods is better for cultivated diamonds?


HPHT Technology: The high temperature and high pressure technology completely simulates the growth process of natural diamonds, reproduces the reaction of the carbon element layer on the ground and converts graphite into diamonds.
HPHT method (temperature 1 400 ℃ -1 700 ℃, pressure 5.2GPa-5.6GPa) Diamond refers to an environment that simulates the growth of natural diamonds, in a hexahedral high-pressure machine, graphite, diamond powder or graphite-diamond powder is used as the carbon source , The equiaxed crystal system formed in the growth environment of high temperature and high pressure, metal catalyst, etc. It only takes a few weeks to produce 20 carats of cultivated diamonds using the high temperature and high pressure method.

The growth process is to put high-purity graphite as a carbon source in the high temperature zone of the growth chamber of the top press, and place diamond seeds in the low temperature zone. Driven by a certain temperature gradient, the carbon source diffuses from the high concentration area at the high temperature to the low concentration area at the low temperature. The diamond seeds in the low temperature area are supersaturated and crystallized, then cooled and taken out, and concentrated nitric acid is used to remove the diamond surface impurities.


CVD Technology:Usually under the action of high temperature plasma, carbon-containing gas is dissociated, and carbon atoms are deposited on the substrate to form a diamond film.Single crystal diamonds are usually formed by the deposition of carbon atoms on the diamond substrate. Carbon-containing gas usually refers to a mixed gas containing nitrogen, methane and hydrogen. Methane is the source of carbon atoms in the synthesis of diamonds. Nitrogen can increase the growth rate, and hydrogen can inhibit the formation of graphite. Usually CVD synthetic diamond is carried out under low pressure and high temperature conditions, the pressure is generally less than one atmosphere, and the temperature is about 1 000 ℃.


From what is said above, we can draw a conclusion:Both technologies have their own advantages. HTHP has higher efficiency and better colors, and CVD has better purity. The production of 1 carat cultivated rough diamond, because high temperature and high pressure (HTHP) is formed by the connection of carbon atoms and carbon atoms, so the growth cycle only takes a few days. Chemical vapor deposition (CVD) is to dissociate and grow carbon-containing gas on the seed wafer, and gradually accumulate and accumulate, which requires a growth cycle of several weeks. Because high temperature and high pressure (HTHP) requires a metal catalyst as a solvent to participate in the reaction, it will have some impact on the purity of the diamond, and the purity of chemical vapor deposition (CVD) is slightly better.


Item Value
Brand name Yuda Crystal
Model number YuDa-HPHT
Place of origin Henan,China
Diamond weight 2.0-2.5ct
White diamond color D E F
Diamond clarity VVS VS SI
Payment term 100% payment
Shipping ways DHL,FEDEX,UPS.EMS
Delivery Time 1 - 7 Working Days Base on Order Quantity

Lab grown & 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.

Lab grown & natural diamonds
lab grown diamonds natural diamonds
grown in a lab mined from the earth
created in months created over billions of years
offer incredible value prized for their rarity

Who are we?

Henan YuDa Crystal Co., Ltd. are based in ZhengZhou city.We are specialized in the export and import business of lab grown diamonds more than 10 years. YuDa is a professional company in all synthetic diamond applications, our main products are cvd diamond, hpht diamond, and customized diamond by your requirements. Our products enjoy a good reputation and are sold to Europe, America, Southeast Asia, South Africa and other countries and regions.


Q:Do you provide samples? Is it free or not?
A: Yes, we provide samples,but not for free.
Q:What are your terms of payment?
A: We accept Paypal,T/T,Western Union and MoneyGram.
Q: Which express company do you use?
A: As usual we used DHL,UPS ,FEDEX Or Brinks.

Q:How can I contact with you?

A:My email

Lab Grown Rough Diamonds Details

2.0-2.5 Ct HPHT DEF Colour Diamond Lab Created Diamond Raw Stones 0

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