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

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

Grating Spectroscopes and How to Use Them is written for amateur astronomers who are just getting into this field of astronomy. Transmission grating spectroscop

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