Mineral Specimens / United States of America (USA) - Fabre Minerals
Tourmaline 9.CK.05 9: SILIKATE (Germanate) C: Cyclosilikate K: [Si 6 O 18 ] 12 - 6- gliedrig…
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Mineral Specimens / United States of America (USA) - Fabre Minerals
Fine Minerals – Superb Minerals
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Collector's Guide to Fine Minerals
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