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Grading polished diamonds. Terminology and classification
This Technical Report specifies the terminology and classification to be used for the grading and description of polished diamonds.
This Technical Report shall only be used for natural, unmounted, polished diamonds. It shall not be used for synthetic diamonds, treated diamonds (other than is allowed for in 3.3), or for assembled stones (see 3.5).
A terminology and classification for the colour of fancy coloured diamonds (see 5.1.2) is in the course of preparation.
Test methods concerning the technical application of this terminology and classification are in the course of preparation.
Specifies the terminology and classification to be used for the grading and description of natural, unmounted, polished diamonds.
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