Walter Schumann

About the Author

Walter Schumann is a 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 rock and mineral identification guides. Schumann lives in Germany.

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