The Gemstones Handbook: Properties, Identification and Use

256 pp. "The Gemstones Handbook is a comprehensive and authoritative guide to the world of precious gems and ornamental stones. Features over 200 mineral gems, organics and synthetics. Clear, concise and user-friendly. Includes background information on crystal structures and rock types. Stunning photos and precise diagrams allow for easy identification. Each entry features an easy-reference table of properties, which include hardness, cleavage and fracture."