This standard specifies the terms and definitions of natural unmounted and mounted polished diamonds, diamond color, clarity, cut grading rules, diamond weight and diamond grading report.
This standard is applicable to diamond grading and related activities in the fields of gems testing, cultural relics testing, commerce and trade, customs, insurance, pawn, asset evaluation, scientific research teaching, and literature publishing.
The color grading in this standard is applicable to unmounted and mounted polished diamonds in the color series ranging from colorless to pale yellow (brown, gray).
The cut grading in this standard is applicable to unmounted and mounted polished diamonds of round brilliant cut.
The grading rules in this standard are applicable to unmounted and mounted polished diamonds that have not been treated by coating,filling, etc.
The grading rules in this standard are applicable to unmounted polished diamonds with a weight of 0.040 0 g(0.2
定价: 1104元 / 折扣价: 939 元 加购物车
This standard specifies the grading rules for unmounted polished and faceted natural sapphires which have not been subjected to enhancement or heat treatment.
This standard is applicable to the unmounted polished and faceted natural sapphires which have not been subjected to enhancement or heat treatment.For the grading of inlaid faceted polished sapphires, this standard may be used as a reference.
This standard is applicable to the blue sapphire grading.The grading of sapphires with other colors may be carried out by reference to this standard.
定价: 516元 / 折扣价: 439 元 加购物车
This standard specifies the grading rules for unmounted polished and faceted natural rubies which haven't been subjected to enhancement.
This standard is applicable to the grading of unmounted polished and faceted natural rubies which haven't been subjected to enhancement. For the grading of mounted faceted polished rubies,this standard may be used as a reference.
定价: 516元 / 折扣价: 439 元 加购物车