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Boralsilite Grandidierite Image

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 Boralsilite, Grandidierite

Large Boralsilite Image

Mineral: Boralsilite: Al16B6Si2O27  
Grandidierite: (Mg,Fe++)Al3(BO4)(SiO4)O
Comments: B&W PPL image of aggregates of boralsilite in quartz near grandidierite. Pyrite is partially replaced by oxide. Abbrev: A+B = Secondary andalusite, B = boralsilite, G = grandidierite, P = pyrite, Q = quartz. (AmMin v93:294).
Location: Pegmatites from the Larsemann Hills, East Antarctica.
Scale: See Image.
Copyright: © American Mineralogist
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