标准摘要
[中文适用范围]： 本文件规定了用于分级和描述超过 0.25 克拉 (ct) 的单颗未镶嵌抛光钻石的术语、分类和方法。 本文件适用于天然、未镶嵌、抛光的钻石。 它不能用于彩色钻石、合成钻石、经过处理的钻石（7.4 中允许的除外），也不能用于组装宝石。 [外文原描述]： This document specifies the terminology, classification and the methods that are used for the grading and description of single unmounted polished diamonds over 0,25 carat (ct). This document applies to natural, unmounted, polished diamonds. It is not to be used for fancy coloured diamonds, synthetic diamonds, treated diamonds (other than is allowed for in 7.4), nor for assembled stones.
英文名称Jewellery and precious metals — Grading polished diamonds — Terminology, classification and test methods