A Photo Survey of Inclusions in Fossiliferous Amber
Nathan Renfro
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
Blue sapphire from Malacacheta of Minas Gerais, Brazil
Malacacheta, located in Minas Gerais, Brazil, is renowned for its alexandrite deposits and com-plex
Bertrandite in Emeralds
Over the past few years we have been seeing more and more lower quality stones in the lab. The reaso