Jewellery and precious metals — Grading polished diamonds — Terminology, classification and test methods
Joaillerie et métaux précieux — Classification des diamants taillés — Terminologie, graduations et méthodes d’essai
01.040.39 - Precision mechanics. Jewellery (Vocabularies).
39.060 - Jewellery. Including precious metals, precious and semi-precious stones
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Ingles / Frances
