Pink-orange gem quality euclase from Bahia, Brazil
Lætitia Gilles-Guéry
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
Bertrandite in Emeralds
Over the past few years we have been seeing more and more lower quality stones in the lab. The reaso