17. Nov IGC 2025 A convincing glass imitation of larimar (pectolite) Gagan Choudhary Download Pdf Other Gemstones
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 Low Temperature Heat Treatment of Madagascar Sapphire One of the challenges facing gemologists today is the detec- tion of low temperature (below 1200°C) Read More Elodie
17. Nov IGC 2025 Noble gas in corundum: interests in gemology Noble gases —elements of the last column of the periodic table—are chemically defined by their f Read More Elodie