Ardesia - IGR - Rivista Italiana di Gemmologia

Home Glossario gemmologico Ardesia

Ardesia: roccia argillosa debolmente metamorfosata, di colore grigio scuro, suddivisibili in lastre dure, prive delle proprietà tecniche delle Argille, quali la plasticità.

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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.

Edita da: Gem Tech SRL – 80122 Napoli (Italy) - P. IVA IT09159321216

Contattaci / Contact us: info@rivistaitalianadigemmologia.com

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