Walter Schumann
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.
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. See less