Contributions to Gemology No. 9 May 2009: Chemical Variations in Multicolored "Paraiba"-Type Tourmalines from Brazil and Mozambique: Implications for Origin and Authenticity Determination

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Adolf Peretti

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Cuprian Elbaite Dr. Adolf Peretti GRS Gemresearch Swisslab AG Gemology Gemstone Testing Geology Laboratory Laser Ablation Mineralogy Paraiba Tourmaline Tourmaline

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