Collins Photo Guide – Rocks, Minerals and Gemstones (Collins Photo Guides S.)
by Walter Schumann
ISBN 13: 9780002199094
Format: Hardcover (384 pages) Publisher: Collins Published: 02 Nov 1992
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Gemstones of the World
by Walter Schumann, E. Stern
ISBN 13: 9780719800511
Format: Hardcover (256 pages) Publisher: NAG Press Published: Nov 1977 Other Format: Illustrated
Gemstones of the World: Newly Revised Fifth Edition
ISBN 13: 9781454909538
Format: hardcover Publisher: Sterling