Contents include the history and development of spectroscopy; a discussion of the nature of absorption spectra and the absorption spectra of solids and gem mine

This edition has been completely revised to cover the latest methods of gem enhancement and identification, as well as the most up-to-date test instruments and

Gemmology is a text for students preparing for the Gemmological Association's Preliminary and Diploma examinations. The book is more expansive and up-to-date th

From the dawn of time, ruby and sapphire have both attracted and fascinated humans in ways that few other items could.While objects of desire are found througho