23. Oct IGC 2023 Colour change Paraiba tourmaline from Brazil By Claudio C. Milisenda, Stefan Müller Download Pdf Tourmaline
23. Oct IGC 2023 Nacreous Blister Pearl Discovered in Edible Oyster (Crassostrea gigas) A baroque pearl with a gray, nacreous appearance was discovered attached to the interior of an edibl Read More Elodie
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 A Review and Synthesis of the Geology and Gem Resources of Granitic Pegmatites in Southern California, USA Gem-bearing pegmatites in Southern California are hosted by the Peninsular Ranges batholith, and occ Read More Elodie
