17. Nov IGC 2025 Automated Data Processing of Raman Spectra for Supporting Spinel Origin Determination Tasnara Sripoonjan, Montira Seneewong Na Ayutthaya, Sirinapa Saengdech, Sutas Singbamroong, Alongkot Fanka Download Pdf GemmologyOriginsSpinel
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 Blue sapphire from Malacacheta of Minas Gerais, Brazil Malacacheta, located in Minas Gerais, Brazil, is renowned for its alexandrite deposits and com-plex Read More Laurent Cartier
17. Nov IGC 2025 An approach to understanding the factors in the emerald enhancement clarity grading system used at CDTECGemlab Emerald is the green variety of beryl, with its distinctive color resulting from trace amounts of ch Read More Elodie