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Standard
| QB/T 4113-2021 Color grading of fancy colored diamond (English Version) |
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Detail of QB/T 4113-2021
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Introduction of QB/T 4113-2021
本文件规定了天然的未镶嵌抛光彩色钻石的颜色分级规 则。 本文件适用于以下类型未镶嵌抛光彩色钻石的颜色分 级： — — 未镶嵌抛光彩色钻石质量大于等于 0.0400g （0.20ct）； —— 除无色至浅黄色钻石色级之外（＜Z 色）的未镶嵌抛光彩色钻石； —— 未经覆膜、裂隙充填、辐照和高温高压等优化处理的未镶嵌抛光彩色钻石。 镶嵌抛光彩色钻石的分级可参照
本文件执行。
Contents of QB/T 4113-2021