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Apatite-(CaOH), Orthoclase


Apatite-(CaOH) : Ca5[OH|(PO4)3], Orthoclase : K[AlSi3O8]

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This Apatite has finally been correctly identified as the species Hydroxylapatite, very less common than Fluorapatite. Crystals, on a matrix of Orthoclase, are flat hexagonal dipyramids with almost no prism faces, a habit that is not often seen with Apatite. Faces of a short prism can be seen on this crystal, a rarity with this material. The Hydroxylapatie is also attractively color zoned.
Sapo Mine, Goiabeira, Aimorés, Minas Gerais Brazil
Found in 2006
Specimen size: 3.5 x 2.4 x 2.8 cm
Main crystal size: 1.8 x 1.2 cm
Zoned fluorescence long & short UV


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