Optical Spectra of Apatites, Ca₅(PO₄)₃F

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• Zwaan JC (2020) Apatite from Durango, Mexico. The Journal of Gemmology 36, 683-684.
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• Zhang C, Chen C, Li Z, Shen AH (2023) Chemical Composition and Spectroscopic Characteristics of Alexandrite Effect Apatite from the Akzhailyau Mountains of Kazakhstan. Minerals 13, 1139.
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