Walter Schumann

Walter Schumann is an acclaimed geologist an leading expert and researcher on gemstones. In addition to the perennially successful Gemstones of the World, first published in 1976, he has authored Collins Guide to Rocks, Minerals, and Gemstones and Handbook of Rocks, Minerals, and Gemstones, among other authoritative guides. His many field guides provide expert advice and education on how to identify gemstones, rocks, minerals. He lives in Germany.