17. Nov IGC 2025 Geographic Origin Determination of Natural Yellow Sapphires: The Preliminary Study Montira Seneewong-Na-Ayutthaya, Bhuwado Wanthanachaisaeng, Thanong Leelawatanasuk, Wilawan Atichat, Sirinapa Saengdech, Pimlapat Kamkaew and Tasnara Sripoonjan Download Pdf OriginsSapphire
17. Nov IGC 2025 On the nature of blue rose quartz Over the past several years, the market for pink-coloured rose quartz has been augmented by variants Read More Laurent Cartier
17. Nov IGC 2025 Fe-Ti charge transfers: A comprehensive review and its applications to minerals and gems The iron-titanium charge transfer (Fe-Ti CT) is mentioned in numerous articles as the source of the Read More Laurent Cartier
17. Nov IGC 2025 Gem-quality pink fluorite from Planggenstock, Switzerland: chemical and physical properties and a comparison with pink fluorites from other localities In this study, first results of trace element analyses and various spectrometric investigations on p Read More Laurent Cartier