HPHT/CVD
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Welcome to Hydray, buy HPHT/CVD laboratory grown diamonds
HPHT Synthetic White Rough Diamond for Jewelry DEF Colour . 1. Brief Introduction of White Diamond. We are a manufacturer specialized in White Diamond, yellow single crystal diamond, diamond abrasives, diamond micron powder, diamond mesh powder, etc.
2019-2-1 · Real diamonds are made deep in the earth's surface where the pressure is so immense that pure carbon is subjected to ultra-high pressure and temperatures over billions of years. Diamonds can only be formed in the 'diamond stability' zone. These zones are estimated to hold temperatures of between 2,000-2,200 degrees Fahrenheit.
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synthetic lab grown rough white diamond HPHT CVD diamond 1,Available size :0.05ct-1ct, 1mm-5mm 2,Purity:VVS-VS-SI 3, Color:E-F-G-H-I 4, Stable quality, and stable ...
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Lab grown synthetic 2ct vs C grade uncut rough diamond cut to SI1 loose diamond; 0.10 Carat Vvs Clarity Synthetic Loose Diamonds Guide Lab Grown Diamond Synthetic; Lab Grown Diamond 1-3mm Pure White VVS Heart And Arrow Round Cut Loose Gemstone; Hydray Lab Grown Diamond 1-3mm White Color VVS Heart And Arrow Round Cut Loose ...
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There are a serious colors for synthetic gems (included cubic zirconia, synthetic spinel, lab created corundum and nano gem) to choose. Each color have an arrange of shades from light to dark. We have over 50 colors to choose like our synthetic gems color chart as below, if you are looking for a color chart, please contact us to get a quote.
2 · The two processes are as follows: one method, known as HPHT synthesis, sees diamonds 'grown' from graphite under high pressure and high temperature (HPHT) conditions (1,300–1,800°C) in a special HPHT press; while CVD synthesis sees diamonds 'grown' from a gas phase – typically CH4 (methane) – under vacuum and distinctly lower ...
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