17. Nov IGC 2025 An approach to understanding the factors in the emerald enhancement clarity grading system used at CDTECGemlab Javier Garcia-Toloza, Juan David Rincón, Cristian Ochoa, Julio Cedeño Carlos Download Pdf Emerald
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 to Red and Violet Diamonds from the Argyle Mine, Australia: Properties, Color Origin and Latest Research Results The Argyle Mine was by very far the largest producer of pink to red diamonds worldwide and the only Read More Laurent Cartier
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