Gemstone Enhancement, Second Edition

by Kurt Nassau

This is the second edition of Nassau's important work on the methods of modifying and enhancing gemstones and of treatments available to enhance the color and appearance of gemstones. This includes various types of irradiation and heat treatment, colorless impregnations, bleaching, dyeing, diffusion and other processes. Some of these processes date back at least two thousand years; others are of quite recent origin.

252 pages, Paperback

First published January 1, 1994