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Glossary of watchmaking

Diffusion treated

Traitement par diffusion de la couleur | 拡散処理/カクサンショリ | 漫反射处理

Diffusion treated

A treatment used on gemstones to enhance their colour. The diffusion process only colours the outer surface of the stone, The CIBJO prohibits the sale of diffusion treated gemstones without mentioning the treatment.