17. Nov IGC 2025 Color Genesis Analysis and Characteristics for Origin Identification of Purple Jadeite Elizabeth Su Download Pdf Jade
17. Nov IGC 2025 Application of Fibre Optics Reflectance Spectroscopy (FORS) for the determination of mineral pigments in jasper The identification of pigments is carried out routinely mostly by X-ray diffraction, FTIR and Raman Read More Laurent Cartier
17. Nov IGC 2025 Studying renowned fancy color diamonds in museum collections: the case of the Winston Red Museums are unique repositories of international treasures. They are also places of active research, Read More Elodie
17. Nov IGC 2025 Shining light on “480 nm band” diamonds: Gemmological characteristics of an unusual group of diamonds with yellow and red luminescence Fancy colour diamonds that derive their colour from nitro- gen-related defects (such as N3/N2 center Read More Elodie