Application of Fibre Optics Reflectance Spectroscopy (FORS) for the determination of mineral pigments in jasper

Over the past several years, the market for pink-coloured rose quartz has been augmented by variants

In 1955, the first report on Thai diamond was made by Dr. Payome Aranyakanon, a renowned tin explora

Performing a literature search is a very important—but often neglected—part of doing gemmologica