Herderite, Schorl

Herderite : CaBe[(F,OH)|PO₄], Schorl : [Na][Fe²⁺₃][Al₆][(OH)₃|OH|(BO₃)₃|Si₆O₁₈]

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Locality: Shigar Valley, Skardu District, Baltistan, Northern Areas, Pakistan

7 cm black schorl tourmaline crystal with overgrowth of translucent colorless herderite crystals to 9 mm. Very good herderite crystals. Overall size of mineral specimen: 8x5x4 cm. Size of individual crystals: 2-9 mm.

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Herderite, Schorl

Herderite : CaBe[(F,OH)|PO4], Schorl : [Na][Fe2+3][Al6][(OH)3|OH|(BO3)3|Si6O18]

Herderite : CaBe[(F,OH)|PO₄], Schorl : [Na][Fe²⁺₃][Al₆][(OH)₃|OH|(BO₃)₃|Si₆O₁₈]