• observations on hpht-grown synthetic diamonds: a review

    Observations on HPHT-Grown Synthetic Diamonds: A Review

    HPHT synthetics are making inroads into the large diamond market, with cut stones larger than 10 carats, as well as the colorless melee market, where small HPHT synthetics are being mass-produced in

  • natural vs synthetic diamonds

    Natural Vs Synthetic Diamonds

    Because of huge shortages of industrial diamonds in war and other areas, ASEA, GE, and De Beers embarked into the world’s most wanted scientific breakthrough of producing Synthetic Industrial Diamonds in 1956. What many of us do not know is that a large proportion of diamonds available in the market today are synthetic ones.

  • yellow cvd synthetic diamond | gems & gemology

    Yellow CVD Synthetic Diamond | Gems & Gemology

    Yellow CVD Synthetic Diamond. The yellow CVD synthetic’s mid-IR spectrum revealed single substitutional nitrogen atoms (N os at 1130 and 1344 cm –1. The diamond Raman band was detected at 1331 cm –1. A hydrogen-related defect was detected at 3107 cm –1, and C-H defects could be observed at 2948, 2920, 2905, 2873, and 2849 cm –1.

  • hpht synthetic big white loose diamond

    HPHT Synthetic Big White Loose Diamond

    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

  • 1.0mm--5.6mm yellow big size hpht rough/ uncut/ single

    1.0mm--5.6mm Yellow Big Size Hpht Rough/ Uncut/ Single

    1.0mm--5.6mm Yellow Big Size Hpht Rough/ Uncut/ Single Crystal Synthetic Diamond , Find Complete Details about 1.0mm--5.6mm Yellow Big Size Hpht Rough/ Uncut/ Single Crystal Synthetic Diamond,Hpht Crystal Diamond,Crystal Diamond,Rough Diamond from Abrasives Supplier or Manufacturer-Henan Yinwang Trade Co., Ltd.

  • [pdf]<h2>introduction first synthetic diamonds - gci gem


    INTRODUCTION First synthetic diamonds - GCI Gem

    HPHT grown diamonds Although most HPHT synthetic diamonds are yellow, some have in recent years also shown large variation in color and saturation available in colorless, blue, green, orange-yellow, yellow-orange and most recently in pink. HPHT techniques can also improve the color of natural-color fancy blue and fancy pink diamonds by

  • what are hpht diamonds? blog

    What Are HPHT Diamonds? 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.

  • hpht diamond

    hpht diamond

    HPHT/CVD Synthetic Lab Grown Diamond 2ND NEW STOCK 2019 - Contact Us for a Quote. Brand New. $1,000.00. From China. New Listing CVD/HPHT Diamond 1.55-1.60 MM TCW 1 VS/E Round Brilliant Cut Diamonds for Ring. New (Other) .35ct VS2 Fancy Intense Yellow Round Brilliant Cut Diamond GIA HPHT Loose. New (Other) $699.99. FAST 'N FREE. Buy It

  • synthetic diamond

    Synthetic diamond

    Nanocrystalline diamond produced through CVD diamond growth can have a hardness ranging from 30% to 75% of that of single crystal diamond, and the hardness can be controlled for specific applications. Some synthetic single-crystal diamonds and HPHT nanocrystalline diamonds (see hyperdiamond) are harder than any known natural diamond.