17. Nov IGC 2025 A convincing glass imitation of larimar (pectolite) Gagan Choudhary Download Pdf Other Gemstones
17. Nov IGC 2025 Automated Data Processing of Raman Spectra for Supporting Spinel Origin Determination pinel is a highly valued gemstone, with its color and quality influenced by trace-element chemistry Read More Laurent Cartier
17. Nov IGC 2025 Pink-orange gem quality euclase from Bahia, Brazil Euclase, monoclinic crystal system—is a seldomly occurring mineral and with a Mohs hardness of 7 a Read More Elodie
17. Nov IGC 2025 Dyed purple Jade (Lavender jade or purple “Fei Cui”) from Mandalay’s jade market, Myanmar Jade or "Fei Cui" are trade names for a stone that typi- cally contains only one or more main minera Read More Elodie