Colored Oil Filling Treatment: a process in which the material (of natural, artificial or cultured origin) has undergone fracture permeation with oil or other oily liquids with the addition of coloring agents (UNI Standard 10245).
Colored Oil Filling Treatment: a process in which the material (of natural, artificial or cultured origin) has undergone fracture permeation with oil or other oily liquids with the addition of coloring agents (UNI Standard 10245).
IGR (Rivista Italiana di Gemmologia/Italian Gemological Review) è la rivista gemmologica internazionale italiana, nata nel 2016 da Gem-Tech con l’obiettivo di sviluppare in Italia un network informativo per Gemmologi e per professionisti quotidianamente impegnati nel settore delle pietre preziose.
IGR – Rivista Italiana di Gemmologia, the Italian Gemological Review, is the leading International Gemological Magazine in Italy masterminded by Gem-Tech Gemological Institute, a broad information framework for Gemologists as well as professionals involved daily in the gemstone business.
Testata registrata al Tribunale di Napoli, reg. n. 15 del 18/05/2017.
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