Cumo, Carlo and Claude Mazloum — Jewelry Gem by Gem: Masters and Materials

Rome, Italy, Gremese International, 1996. Hardcover. Blck buckram, black & color illus. dust jacket, 287 pp. many color illus. "Every important stone presented is accompanied by its own detailed data sheet. Chemical formula, hardness, specific gravity, color, varieties, synthetics and similar substances, as well as 10x lens analysis, are only some of the aspects discussed here with scientific thoroughness yet in a language all can readily understand. In addition, each table is enriched with an in-depth, analytical supplement including interesting sidelights on how each gem got its name, where the richest deposits are found, and a host of other fascinating details." (dj). VG .