17. Nov IGC 2025 Challenges in the Detection of Ruby and Sapphire Treatment in the Thai Market Supparat Promwongnan, Wilawan Atichat, Cheewaporn Suphan, Wassana Chongraktrakul, and Visut Pisutha-Arnond Download Pdf RubySapphireTreatments
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
17. Nov IGC 2025 Hessonite garnet from Angul district of Odisha, India This study describes hessonite (Fe-bearing variety of grossular garnet), found in the Birlamunda vil Read More Elodie
17. Nov IGC 2025 Spinel from Sri Lanka – An update Most of the spinels are found in shades of red to purple. Colourless, green and cobalt bearing varie Read More Elodie
