- 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.
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