• hpht synthetic diamonds- lab grown diamonds supplier from china

    HPHT synthetic diamonds- lab grown diamonds supplier from china

    With CVD or HPHT method, people can synthesize yellow and white diamonds. HPHT Synthetic diamonds can be used for diamond rings, earrings and necklaces, and other general diamond jewelry. Or some special commemorative diamonds. Nowadays, the production technology of synthetic diamonds is becoming more and more perfect.

  • near-colorless hpht synthetic diamonds from aotc group

    Near-Colorless HPHT Synthetic Diamonds from AOTC Group

    By comparison, AOTC states that growth periods for yellow and blue HPHT synthetic diamonds are 5–6 days and 7–10 days, respectively (D.NEA, 2014d,e). There is no post-growth treatment known to reduce color saturation in near-colorless HPHT synthetic diamonds, and AOTC claims to sell its “white” products in the as-grown state (D.NEA, 2014b).

  • hpht diamonds for sale | dianer diamonds

    HPHT Diamonds For Sale | Dianer Diamonds

    HPHT ("High Pressure, High Temperature") is a diamond enhancement procedure that is commonly used around the world to enhance a natural diamond's color by submitting it through high amounts of pressure and high temperatures. Dianer Diamonds Ltd. implements this treatment on type IIa natural stones.

  • blue hpht synthetic diamond over 10 carats | the jewelry magazine

    Blue HPHT Synthetic Diamond Over 10 Carats | The Jewelry Magazine

    In September 2016, GIA’s Hong Kong laboratory tested a 10.08 ct blue synthetic diamond grown by the high-pressure, high-temperature (HPHT) method. This was the largest HPHT synthetic diamond recorded to date. It was also the largest HPHT blue synthetic diamond GIA has examined, surpassing a 5.27 ct sample examined by the Hong Kong lab in […]

  • hpht diamond - manufacturers & suppliers in india

    HPHT Diamond - Manufacturers & Suppliers in India

    We have attained an incredible place in this domain by offering an exclusive range of Natural HPHT Diamond. By making use of cutting-edge techniques and quality tested materials, the offered range is manufactured in tune with set standards of industry.

  • china fancy yellow high quality hpht diamond for jewelry ...

    China Fancy Yellow High Quality Hpht Diamond for Jewelry ...

    Hpht Diamond, Diamond Jewelry, Synthetic Diamond manufacturer / supplier in China, offering Fancy Yellow High Quality Hpht Diamond for Jewelry, High Quality Steelmaking Ferro Phosphorus/FEP Powder, Ferro Phosphorus/FEP Deoxidier Unit Price and so on.

  • hpht diamonds manufacturer, hpht diamonds manufacturer ...

    Hpht Diamonds Manufacturer, Hpht Diamonds Manufacturer ...

    About 64% of these are loose diamonds, 20% are abrasives, and 4% are loose gemstone. A wide variety of hpht diamonds manufacturer options are available to you, such as round brilliant cut, asscher cut, and princess cut.

  • what is the difference between cvd diamonds and hpht diamonds?

    What is the Difference between CVD diamonds and HPHT diamonds?

    HPHT diamonds are processed in a controlled laboratory, and put under extreme heat, and pressure, which changes the color of the diamond from a brownish tint to white. Diamonds that are subjected to the HPHT treatment must have a clarity of VS1 or better.

  • identifying lab-grown diamonds | research & news

    Identifying Lab-Grown Diamonds | Research & News

    HPHT-grown synthetic diamonds are now available in the gem and jewelry marketplace in a wide range of colors, as evident from this attractive synthetic yellow diamond jewelry (1.00 to 1.25 cts) provided by Gemesis Corp. and these loose synthetic diamonds (each under 1 ct) from Lucent Diamonds and Chatham Created Gems.

  • synthetic diamond - wikipedia

    Synthetic diamond - Wikipedia

    Synthetic diamond is the hardest known material, where hardness is defined as resistance to indentation. The hardness of synthetic diamond depends on its purity, crystalline perfection and orientation: hardness is higher for flawless, pure crystals oriented to the direction (along the longest diagonal of the cubic diamond lattice).

  • hpht white synthetic diamond for making jewelry suppliers ...

    Hpht White Synthetic Diamond For Making Jewelry Suppliers ...

    Hpht White Synthetic Diamond For Making Jewelry, Hpht White Synthetic Diamond For Making Jewelry Suppliers Directory - Find variety Hpht White Synthetic Diamond For Making Jewelry Suppliers, Manufacturers, Companies from around the World at hpht diamond ,hpht rough diamond ,yellow hpht rough diamond, Loose Gemstone

  • blue hpht synthetic diamond over 10 carats | the jewelry magazine

    Blue HPHT Synthetic Diamond Over 10 Carats | The Jewelry Magazine

    In September 2016, GIA’s Hong Kong laboratory tested a 10.08 ct blue synthetic diamond grown by the high-pressure, high-temperature (HPHT) method. This was the largest HPHT synthetic diamond recorded to date. It was also the largest HPHT blue synthetic diamond GIA has examined, surpassing a 5.27 ct sample examined by the Hong Kong lab in […]

  • what are hpht diamonds? - the brilliance blog

    What Are HPHT Diamonds? - The Brilliance Blog

    The HPHT process allows manufacturers to select flawed or discolored diamonds and alter them into more desirable colorless, pink, blue, or canary yellow diamonds. Process: To recreate the process that takes place deep inside the Earth’s crust, HPHT diamonds are subjected to extremely high temperature and pressure inside special machines in a lab.

  • high pressure high temperature diamond color treatment hpht ...

    High Pressure High Temperature Diamond Color Treatment HPHT ...

    Irradiation, followed by a high heat treatment, turns brownish and yellow diamonds into fancy colored diamonds of all hues. The color of some diamonds can be dramatically changed by using HPHT diamond color treatments. Recently, we have seen HPHT color treated diamonds with vibrant yellowish green, radiant red and deep blue colors enter the market.

  • wholesale fancy d to h color hpht cvd synthetic loose ...

    Wholesale Fancy D To H Color Hpht Cvd Synthetic Loose ...

    Wholesale Fancy D To H Color Hpht Cvd Synthetic Loose Diamonds For Jewelry Making , Wholesale Fancy D To H Color Hpht Cvd Synthetic Loose Diamonds For Jewelry Making,Buy Loose Diamonds,Cvd Diamond,Hthp Diamond Suppliers from Loose Diamonds Supplier or Manufacturer-Guangxi Wuzhou Starsgem Co., Limited

  • hpht diamond machine, hpht diamond machine suppliers and ...

    Hpht Diamond Machine, Hpht Diamond Machine Suppliers and ...

    About 43% of these are abrasives, 21% are loose diamonds, and 15% are other metal & metallurgy machinery. A wide variety of hpht diamond machine options are available to you, such as paid samples.

  • hpht diamond manufacturers & suppliers - made-in-china

    Hpht Diamond manufacturers & suppliers - made-in-china

    China Hpht Diamond manufacturers - Select 2019 high quality Hpht Diamond products in best price from certified Chinese Diamond Jewelry manufacturers, Diamond Product suppliers, wholesalers and factory

  • observations on hpht-grown synthetic diamonds: a review

    Observations on HPHT-Grown Synthetic Diamonds: A Review

    This study, the first comprehensive summary published on such a large number and wide variety of samples, describes the reliable means of identifying them, with a focus on material currently marketed for jewelry use. The color of HPHT synthetic diamonds analyzed by GIA has shifted noticeably during this time—in the early years, orange-yellow ...

  • diamond price comparison - hpht diamonds vs. non-hpht diamonds

    Diamond Price Comparison - HPHT Diamonds Vs. Non-HPHT Diamonds

    HPHT Diamonds Vs. Non-HPHT Diamonds An HPHT stand for High Pressure High Temperature, which is very similar to nature treatment, is a process which is very similar to nature, putting the diamond back into the environment in which is formed.

  • synthetic diamonds - are they worth the value? - diamond review

    Synthetic Diamonds - Are They Worth The Value? - Diamond Review

    I recently purchased a synthetic diamond from Quorri (their PureDiamond stone that is 100% carbon, 10mohs, using HTHP). This diamond is graded by GIA and it is simply beautiful and the quality and sparkle is incredible. Not to be confused with their DymondIX that is a diamond coated stone (89% ca...

  • hpht treated diamonds about

    HPHT treated Diamonds about

    And this allows the otherwise not sellable poor color diamond to become a sellable fancy color diamond. Even comes with a very strong reaction to ultra violet light that helps to identify the HTHP treated fancy yellow-green diamond as seen at right.

  • yellow hpht synthetic diamond crystal, superabrasive material ...

    Yellow HPHT synthetic diamond crystal, superabrasive material ...

    Then, the mixture is cooled and washed with acid, which results in a synthetic diamond. Quality of synthetic diamonds can vary from inferior to superior to the natural diamond, depending upon the technology and individual manufacturing processes. The methods used in the production of synthetic diamonds are high pressure high temperature (HPHT ...

  • hpht / color diamond - pcd-pdc

    HPHT / Color Diamond - pcd-pdc

    HP-HT Color Enhancement Process. Natural Fancy Colored Diamonds are extremely rare and are highly priced because of their rarity. Fancy Diamonds are completely out of reach of ordinary people and also for the Diamond dealers unless you can pay $30,000 for a 1 carat vivid yellow, $150,000 for a one carat fancy blue, and $500,000 and more for a one carat fancy intense red.

  • how are lab grown diamonds made? - arden jewelers

    How Are Lab Grown Diamonds Made? - Arden Jewelers

    Diamonds are a crystalline form of carbon, and so making artificial carbon crystal was the problem of lab grown diamonds. For decades, manufacturers of synthetic gemstones tried growing diamonds like they grew rubies, sapphires, and emeralds. It failed. Then they had the idea to grow diamonds in the lab like they grew in nature.

  • hpht synthetic big white loose diamond - llgem

    HPHT Synthetic Big White Loose Diamond - llgem

    4. Introduction of LILIANG DIAMOND Manufacturer: Liliang is a professional manufacturer of Gem Quality Synthetic Diamonds, also called Artificial Diamonds with Cheap Price. Being one of suppliers of Synthetic Diamond in China, Our factory pay more attention on Technology Improvement for Bigger Size HTHP Synthetic Diamond with Cheap Price for Sale.

  • high pressure high temperature diamond color treatment hpht ...

    High Pressure High Temperature Diamond Color Treatment HPHT ...

    Irradiation, followed by a high heat treatment, turns brownish and yellow diamonds into fancy colored diamonds of all hues. The color of some diamonds can be dramatically changed by using HPHT diamond color treatments. Recently, we have seen HPHT color treated diamonds with vibrant yellowish green, radiant red and deep blue colors enter the market.

  • yellow hpht diamond - hnyinwang.en.alibaba

    Yellow HPHT Diamond - hnyinwang.en.alibaba

    Yellow HPHT Diamond from Henan Yinwang Trade Co., Ltd.. ... CVD /HTHP Synthetic Yellow Diamond For Jewelry. $1.00 ... Fancy Yellow color cut lab grown cvd hpht diamond.

  • hpht diamond? | pricescope forum

    HPHT Diamond? | PriceScope Forum

    If you want to sell an HTHP diamond second hand to a dealer you'll be lucky to find a buyer. Sure, somebody may make a mistake or be willing at a very low price, but it is a large deterrent to getting it sold back to the trade. If you sell it to a consumer, which is never easy, you might come out alright, but don't plan on getting so lucky.

  • synthetic diamonds - are they worth the value? - diamond review

    Synthetic Diamonds - Are They Worth The Value? - Diamond Review

    I recently purchased a synthetic diamond from Quorri (their PureDiamond stone that is 100% carbon, 10mohs, using HTHP). This diamond is graded by GIA and it is simply beautiful and the quality and sparkle is incredible. Not to be confused with their DymondIX that is a diamond coated stone (89% ca...

  • lab grown diamonds & man made diamonds | miadonna

    Lab Grown Diamonds & Man Made Diamonds | MiaDonna

    However, the majority of both mined and lab-created diamonds contain impurities, most of which are nitrogen. The nitrogen atoms within the diamond lattice create the yellow tint. In cases of fancy colored diamonds, a pure yellow color is created. Nearly all diamonds, both mined and lab-created, start out as yellow diamonds.