23. Oct IGC 2023 Colour change Paraiba tourmaline from Brazil By Claudio C. Milisenda, Stefan Müller Download Pdf Tourmaline
23. Oct IGC 2023 DNA Fingerprinting and age dating of historic natural pearls: a combined approach Natural pearls are accidental formations in wild oysters. The lack of new supply in recent decades h Read More Elodie
23. Oct IGC 2023 Colour varieties of gems – where to set the boundary? In theory it is simple: a gemstone is a mineral formed in nature by geological processes and, as suc Read More Elodie
23. Oct IGC 2023 Irradiation treatment and gamma-spectroscopy of morganite The pink variety of beryl, morganite, is one of the most popular orangey-pink to pink gemstones. Its Read More Elodie
