Contributions to Gemology No.9 - Chemical variations in multicolored "Paraíba"-type tourmalines from Brazil and Mozambique Quotes

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Contributions to Gemology No.9 - Chemical variations in multicolored "Paraíba"-type tourmalines from Brazil and Mozambique: implications for origin and authenticity determination Contributions to Gemology No.9 - Chemical variations in multicolored "Paraíba"-type tourmalines from Brazil and Mozambique: implications for origin and authenticity determination by Adolf Peretti
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