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Nobleite : CaB6O9(OH)2·3H2O, Colemanite : Ca[B3O4(OH)3]·H2O

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Nobleite : CaB6O9(OH)2·3H2O, Colemanite : Ca[B3O4(OH)3]·H2O


White Nobleite crystals on tan drusy Colemanite. R. Currier collection. Specimen is one of the best from this small find. The scale at the bottom of the image is an inch with rule at one cm.

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Photo added: 19th Jun 2009