All types and varieties, 1900 unique pieces!
 Professor Dr. Schumann offers a comprehensive and up-to-date overview of the fascinating world of gemstones. A must-have for almost every goldsmith and gemstone collector: it includes an introduction, numerous individual descriptions, all the important properties, and a color-based identification chart. It is incredibly informative. Additional chapters cover the formation, structure, and properties of gemstones, as well as deposits, extraction, processing, imitations, and forgeries.

 320 pages, numerous color photos and drawings.
 20th edition, 2020.