Catalyst: in chemistry, a substance that, although present in minimal quantities, exerts an accelerating (or retarding) action on the speed of a reaction, taking part in the most important stages of the reaction itself. In gemology, chemical compounds that are used in the process of forming synthetic gems through the process of fusion with flux.
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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