Gemesis Inc. was a privately held company located in New York City. The company grew synthetic diamonds using proprietary technology. Gemesis had the world's largest facilities for both the high-pressure high-temperature (HPHT) and chemical vapor deposition (CVD) diamond production methods. Using these methods, Gemesis produced high-quality colorless and fancy color diamonds that were offered for sale at 20–30% lower prices than mined natural diamonds of similar quality (and, from some suppliers, lower prices than that). By about 2010, Gemesis was the principal producer of gem quality lab created diamonds and jewelry. More information...
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