23. Oct IGC 2023 Colour change Paraiba tourmaline from Brazil By Claudio C. Milisenda, Stefan Müller Download Pdf Tourmaline
23. Oct IGC 2023 Cobalt spinel from Bai Buoi mine, Yen Bai, Vietnam The cobalt bearing spinel from Lukande, Tanzania, discovered in 2019, has attracted much attention a Read More Elodie
23. Oct IGC 2023 Study of a historical Alexandrite from Paris school of mines collection Rare are the scientific studies on exceptional gemstones belonging to museum collections. This inves Read More Elodie
23. Oct IGC 2023 Purple to bluish grey chalcedony from Ethiopia In the past 15 years, Ethiopia has repeatedly gained attention for a variety of new gem finds. In 20 Read More Elodie
