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Graphite: Graphite mineral information and data.Cirkel, Fritz (1907), Graphite: its properties, occurrence, refining and uses: Department of Mines, Mines Branch, Ottawa, Canada, 307pp. Alling, Harold L. (1917), The ...
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Elbaite tourmaline: The mineral Elbaite …Among the most noteworthy sources of Elbaite is the state of Minas Gerais, Brazil, where outstanding forms and colors of this beautiful Tourmaline are found in ...
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