The gases and chemicals used in laboratory-created diamonds don’t seem to have a negative effect on the person wearing the diamond. Because the gases are used to simply used to generate high pressures and high temperatures in creating the diamond, the gases and chemicals do not reside on the surface of the diamond.
Chemical vapor deposition, or CVD, is a technique that is commonly applied in the manufacturing of laboratory-created diamonds. Growing a CVD diamond occurs under pressures of 1 to 27 kPa (kilo pascals), with varying amount of gas in the chamber, which are energized to provide diamond growth on the substrate. Sources of the gas always includes carbon, hydrogen, too, though amounts vary according to the type of diamond being grown.
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