Precious Stones is a superbly illustrated guide that covers a wide range of gems and precious stones, including diamonds, emeralds, and opals, along with ornamental materials like ivory and amber. With over 380 color illustrations, the book details the characteristics of these materials, such as their crystal form, physical properties, occurrence, and value, using text-side symbols to indicate qualities like hardness and density. This comprehensive text serves as a valuable resource for both enthusiasts and specialists interested in the complete spectrum of natural and man-made gems.