Specimen ID: XNK-NHW

Colemanite : Ca[B3O4(OH)3]·H2O
Mindat locality:
39mm x 21mm x 21mm

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3.9 x 2.1 x 2.1 cm. A very sculptural and aesthetic miniature of sharp, pyramidal, color-zoned colemanite crystals from Boron. Color-zoned, tan crystals of this quality are very uncommon from Boron. Ex. Ed Bancroft Collection.
Robert Lavinsky - 7th December 2012

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39x21x21mm overall size.
Y. Okazaki - 3rd July 2013 Photo of the Day

Y. Okazaki - 20th July 2015
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