As time goes by, precious jewels are worth being collected for a lifetime and passed on from generation to generation. And proper care will maintain its lustre. Dust, pollution, or long-term frequent wearing may dim the gem’s brilliance. The surface of gold, platinum and sterling silver jewellery may also lose its lustre.
Cultivated diamonds are synthesized in the laboratory, which has the same physical properties, chemical composition and crystal structure as natural diamonds. At present, the main synthetic methods of gem grade diamond are high temperature and high-pressure synthesis (HPHT synthesis) and chemical vapour deposition (CVD).
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