Sign In | Join Free | My himfr.com
Home > HPHT Lab Grown Diamonds >

4-5 Carat Round HPHT Uncut Raw Diamonds DEF Color VVS VS SI Purity For Loose Diamonds

Henan Yuda Crystal Co.,Ltd
Trust Seal
Verified Supplier
Credit Check
Supplier Assessment
Contact Now
    Buy cheap 4-5 Carat Round HPHT Uncut Raw Diamonds DEF Color VVS VS SI Purity For Loose Diamonds from wholesalers
     
    Buy cheap 4-5 Carat Round HPHT Uncut Raw Diamonds DEF Color VVS VS SI Purity For Loose Diamonds from wholesalers
    • Buy cheap 4-5 Carat Round HPHT Uncut Raw Diamonds DEF Color VVS VS SI Purity For Loose Diamonds from wholesalers
    • Buy cheap 4-5 Carat Round HPHT Uncut Raw Diamonds DEF Color VVS VS SI Purity For Loose Diamonds from wholesalers
    • Buy cheap 4-5 Carat Round HPHT Uncut Raw Diamonds DEF Color VVS VS SI Purity For Loose Diamonds from wholesalers
    • Buy cheap 4-5 Carat Round HPHT Uncut Raw Diamonds DEF Color VVS VS SI Purity For Loose Diamonds from wholesalers

    4-5 Carat Round HPHT Uncut Raw Diamonds DEF Color VVS VS SI Purity For Loose Diamonds

    Ask Lasest Price
    Brand Name : Yuda Crystal
    Model Number : RBC
    Certification : None
    Price : Negotiate
    Payment Terms : 100% Payment In Advance
    Supply Ability : 50000carats per month
    Delivery Time : 1-7 working days
    • Product Details
    • Company Profile

    4-5 Carat Round HPHT Uncut Raw Diamonds DEF Color VVS VS SI Purity For Loose Diamonds

    4-5 Carat Round HPHT Uncut Raw Diamonds DEF Color VVS VS SI Purity For Loose Diamonds


    Lab Created Diamonds Description


    Lab-grown diamonds are also known as lab-made diamonds. There are two main methods to make the laboratory breeding diamond: CVD and HPHT.


    Diamonds are considered the hardest material in the world. According to the Mohs hardness scale, it is divided into 10 grades, of which diamond is the highest grade. From the people know that diamond is composed of pure carbon that day, more and more people in laboratory breeding of high temperature and high pressure diamond were studied. At present, the laboratory raw high temperature and high pressure diamond industry develops rapidly and is widely used in various industries and processing industries.

    High temperature and high pressure synthesis of diamond technology originated in the 1950 s, initially was applied in aviation and military industry, nearly 10 years to achieve a qualitative leap in technology, gem grade synthetic diamond both in quality and cost is up to the level of the market.

    Artificial diamonds, often referred to as lab-grown HPHT diamonds, are created by mimicking the crystallization process of natural diamonds. Natural diamond to form in the natural environment, often mixed with other elements, which makes some natural diamonds are not completely transparent, will show the specific color. For example, some with a pink diamonds, some a bit blue, some with a light yellow. HPHT diamonds are grown in a laboratory and have fewer impurities than natural diamonds, so they are more pure and transparent.

    Natural diamonds take millions of years to form. Before a volcano erupts, underground lava Wells about 150 to 200 kilometers deep can slowly cool in the crater, because the crater is often blocked. Pure carbon material pressure is 4.5 * 10 ^ 6 ~ 9 pa. When the temperature drops to 1000 ~ 1250℃, natural diamond crystals are formed. Deep inside the earth a few places have the physical and chemical conditions of forming the diamond.

    However, under the condition of the natural growth of the production of natural diamond, can now be simulated in the laboratory, the use of high temperature and high pressure (HPHT) or chemical vapor deposition (CVD) techniques, in just a few weeks can produce the lab production of gem grade diamond.


    Parameters Of Lab Created Diamonds


    Product NameSynthetic (Lab created) diamond
    MaterialLab-grown
    ColorDEF
    ShapeRound
    TechnologyHPHT
    Diamond CutUncut
    Payment Terms100% Payment In Advance
    Diamond Carat Weight2CT-4CTS
    GradeVVS VS SI
    Shipping wayDHL, FedEx, SF Express, UPS, EMS, TNT etc
    M.O.QNegotiable
    Delivery Time1-7 Working Days Depends On Quantity
    Payment MethodsT/T, PayPal, Western Union, Bank Transfer
    UsedJewelry (necklace,ring,earring)
    ApplicationFor Cutting Lab Grown Loose Diamonds
    Place Of OriginZhengzhou, China

    Characteristics Of Lab Created Diamonds


    Lab grown diamonds in the chemical, optical and structure are the same as the mining of diamonds. What does that mean?


    The Difference Between Lab Diamond And Natural Diamond
    AttributeLab-Created DiamondsNatural diamondDistinction
    Chemical compositionC(carbon)C(carbon)No
    Refractive index2.422.42No
    Relative density3.523.52No
    Dispersion0.0440.044No
    Hardness value90 GPA90 GPANo
    Thermal conductivity2*103 W/M/K2*103 W/M/KNo
    Thermal property0.8*10-6 K0.8*10-6 KNo
    Light transmittanceDEEP UV TO FAR TRDEEP UV TO FAR TRNo

    Resistivity

    1016 OHM-CM

    1016 OHM-CM

    No

    Compressibility

    8.3*10-13 M2/N

    8.3*10-13 M2/N

    No


    From a scientific point of view, synthetic diamond and natural diamond exactly the same, the only difference is that the formation of their location.


    Lab Created Diamonds Details

    Quality 4-5 Carat Round HPHT Uncut Raw Diamonds DEF Color VVS VS SI Purity For Loose Diamonds for sale
    Inquiry Cart 0
    Send your message to this supplier
     
    *From:
    *To: Henan Yuda Crystal Co.,Ltd
    *Subject:
    *Message:
    Characters Remaining: (0/3000)