Henmilite, Olshanskyite

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Gemmy, deep blue crystals to 2 mm of the ULTRA-RARE copper borate henmillite nicely lined up on contrasting white matrix, which includes another ultra-rare calcium borate, olshanskyite. Henmillite of such quality is found ONLY at the Fuka Mine on Honshu Island, Japan. 1.6 x 1.2 x 0.9 cm