ISO 6893:2024

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ISO 6893:2024 is an international standard that specifies how to inspect batches of colorless diamonds that are unmounted and polished. It covers the terminology, classification, and test methods for these diamonds. The standard applies to diamonds that weigh 0.25 carats or less. 

This document specifies the terminology, classification and test methods that are used for the inspection of batches of unmounted polished colourless diamonds with single mass smaller than or equal to 0,25 ct (carat).