Tiêu chuẩn 4C cho kim cương nuôi cấy trong phòng thí nghiệm

Basic overview The so-called ‘4Care short for the four words beginning with the C, referring to the diamond’s CARAT WEIGHT, CLARITY, COLOUR, and CUT. By combining the four points of the “4C”, it is easy to understand the value and quality of a diamond. In terms of value for money, there must be a

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