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

Most of the spinels are found in shades of red to purple. Colourless, green and cobalt bearing varie

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

Gemology is traditionally practiced in laboratories, focused on identifying and analyzing gemstones.