Pink-orange gem quality euclase from Bahia, Brazil
Lætitia Gilles-Guéry
Gems in Greece: Geology, mineralogy and crystallizing environment
In the accretionary Hellenides Orogen, gems occur in various rock types of mainly four tectonometamo
Bertrandite in Emeralds
Over the past few years we have been seeing more and more lower quality stones in the lab. The reaso
