23. Oct IGC 2023 Colour change Paraiba tourmaline from Brazil By Claudio C. Milisenda, Stefan Müller Download Pdf Tourmaline
23. Oct IGC 2023 Color enhancement in yellow sapphire Natural yellow sapphire is colored by one or the combination of two different chromophores, Fe3+ and Read More Elodie
23. Oct IGC 2023 An implementation of machine learning in ruby and sapphire origin determination Country-of-origin is one of the most important value factors of corundum (ruby and sapphire) due mai Read More Elodie
23. Oct IGC 2023 Gemological and Luminescence Characteristics of Taaffeites from Mogok, Myanmar Taaffeite is a rare gem that has been found in different localities such as Tanzania, Sri Lanka, Chi Read More Elodie
