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 Low Temperature Heat Treatment of Madagascar Sapphire One of the challenges facing gemologists today is the detec- tion of low temperature (below 1200°C) Read More Elodie
17. Nov IGC 2025 Zoisite and its many color The mineral zoisite is a calcium alumosilicate belonging to the class of silicates, more exactly sor Read More Elodie
17. Nov IGC 2025 Gems in Hellenistic and Roman Jewellery of Northern Greece: An investigation from the Collections of the Archaeological Museum of Thessaloniki, Greece This study presents the results of an interdisciplinary archaeogemological investigation focusing on Read More Laurent Cartier