The most comprehensive reference on gem materials. Lists the characteristics, both physical and optical, for more than 550 gem materials. Includes 346 distinct natural minerals and describes 56 man-made gems.
A great source for identification of gem materials. Includes a complete set of tables for hardness, specific gravity, and refractive index. Covers cutting characteristics for both cabochons and faceted gems.
Lists common inclusions for each mineral.
An excellent resource for the study of natural and man-made gem minerals.
Softcover, 159 pgs.
