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Simon & Schuster's Guide to Gems and Precious Stones: Simon & Schuster, Lyman, Kennie: 9780671604301: Amazon.com: Books
A Hand-book of Precious Stones eBook by Baron Mayer Amschel de Rothschild - EPUB | Rakuten Kobo United States
The Project Gutenberg eBook of The Curious Lore of Precious Stones, by George Frederick Kunz.
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