Travertine: chemical sedimentary rock composed mainly of Calcite or Aragonite, often containing impressions of plant material. It typically appears in light, yellowish, or pinkish colors and features bands with fibrous concretions.
Travertine
Travertine: chemical sedimentary rock composed mainly of Calcite or Aragonite, often containing impressions of plant material. It typically appears in light, yellowish, or pinkish colors and features bands with fibrous concretions.
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.
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