Certificate 0.44ct FVY SI1 Pear cut lab diamonds EX video

  The metal catalyst as a solvent is between the carbon source (usually graphite) and the diamond seed crystals. Since the solubility of the carbon source at the high temperature end is greater than that at the low temperature end, the difference in solubility produced by the temperature difference becomes the driving force for the diffusion of the carbon source from the high temperature end to the low temperature end, and the carbon source gradually precipitates at the seed crystal, and the diamond crystal gradually grows. Since the driving force of crystal growth is caused by the temperature difference, this method is also called the temperature difference method.