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.
Status: PublishedPublication date: 2020-09
Edition: 1Number of pages: 55
Technical Committee: ISO/TC 174 Jewellery and precious metals
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