23. Oct IGC 2023 Colour change Paraiba tourmaline from Brazil By Claudio C. Milisenda, Stefan Müller Download Pdf Tourmaline
23. Oct IGC 2023 New yellow to grey-brown opals from Australia With the mining activity for over 170 years (Hsu et al., 2015), Australia has been a premium source Read More Elodie
23. Oct IGC 2023 Treated jadeite-jade: Unusually bright fancy colours Jadeite-jade is a precious ornamental stone that has been valued as the topmost decorative stone and Read More Elodie
23. Oct IGC 2023 Applications of Python for Spectroscopic Data Processing, Analysis and Machine Learning Modeling in Gemmology Python, a powerful programming tool with extensive scientific computing capabilities, is being incre Read More Elodie
