17. Nov IGC 2025 Zoisite and its many color Clemens Schwarzinger, Steve Ulatowski, George R. Rossman Download Pdf Other Gemstones
17. Nov IGC 2025 Historic Emeralds and their Geographic Origin: A Retrospective Study When it comes to the geographic origin of gems, curiously enough, historians sometimes put forward p Read More Elodie
17. Nov IGC 2025 Advancing Fei Cui Origin Authentication: A comparison of green fei cui from Myanmar, Guatemala, Italy and Russia In recent years, an increasing number of sources of fei cui, such as Guatemala, Italy and Russia, ha Read More Elodie
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
