HPHT/CVD
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Welcome to Hydray, buy HPHT/CVD laboratory grown diamonds
Both CVD and HPHT diamonds can be cut into gems and various colors can be produced: clear white, yellow, brown, blue, green and orange. They never lose their their shine or color and are also cut and polished in the same way as mined diamond,they have the same lustre and fire as the mined diamonds .
2016-12-13 · Yes, synthetic diamonds now come in as high a quality and nearly as wide a variety of sizes and colors as natural diamonds. Many major retailers offer colorless laboratory-grown diamonds, and Lightbox, part of the De Beers Group, offers a line of .
Diamonds are so hard, they can only be cut or polished by another diamond. Most diamonds are colorless, but yellow, brown, green, gray, black, pink, blue, red and purple diamonds can also be found. Diamonds are measured in carats - the higher the carat weight and purity level of a stone, the more valuable the gem.
2017-11-10 · From 2007 through 2016, most of the HPHT synthetic diamonds analyzed by GIA were in the 0.2-0.5 and 1.0-1.5 ct range. The data here are divided into 0.1 ct increments.
HPHT processes produce yellow and orange diamonds that can be quite large (0.5 to 3 carats). Another way to recognize a synthetic diamond is that it has very specific impurities which are different from the ones found in nature. Indeed, .
Wholesale of loose fancy color diamonds for custom watches, rings, earrings, necklaces... Diamond melees available in parcels and per stone. Since 1965.
2017-11-10 · From 2007 through 2016, most of the HPHT synthetic diamonds analyzed by GIA were in the 0.2-0.5 and 1.0-1.5 ct range. The data here are divided into 0.1 ct increments.
2016-11-7 · HPHT synthetic diamond melee growth is quickly becoming a large industry in China (figure B-1, left). Factories full of HPHT presses can be found in the Chinese city of Zhengzhou, where companies can each produce more than 1,000 carats of near-colorless synthetic diamonds per day (W. Wang, pers. comm., 2016).
The cuboctahedral form exhibited by these two experimental Sumitomo synthetic diamond crystals (0.23 and 1.25 ct; reference nos. 21706 and 21705, respectively) is typical of synthetic diamonds ...
1 · 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 ...
Green Diamond. If your budget is big enough, why not opt for a green diamond? One of the rarest natural colors of diamond, green hues are especially desirable. These colors arise from nitrogen, hydrogen, and nickel in the diamond crystal structure or from .
The cuboctahedral form exhibited by these two experimental Sumitomo synthetic diamond crystals (0.23 and 1.25 ct; reference nos. 21706 and 21705, respectively) is .
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The cuboctahedral form exhibited by these two experimental Sumitomo synthetic diamond crystals (0.23 and 1.25 ct; reference nos. 21706 and 21705, respectively) is typical of synthetic diamonds ...
Editor's Note: Many gemstones can be created in the laboratory and have a longer manufacturing history than diamond. This synthetic gemstone guide covers rubies, sapphires, emeralds, opals, and many more species and explains their fabrication .
2017-11-10 · From 2007 through 2016, most of the HPHT synthetic diamonds analyzed by GIA were in the 0.2-0.5 and 1.0-1.5 ct range. The data here are divided into 0.1 ct .
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