Bixbyite, Topaz

Specimen ID: 1HE-0G8

Bixbyite : Mn3+2O3
Topaz : Al2(SiO4)(F,OH)2
As recorded:
Thomas Range, Juab County, Utah, USA
Mindat locality:
52mm x 31mm x 33mm
A super sharp bixbyite crystal and several topaz crystals are well exposed on the side of this rhyolite matrix. The bixbyite crystal is pitch-black and shows sharp indentations caused by modifying faces. It does have one corner missing but otherwise is amazing! As well, there are a couple of doubly-terminated topaz crystals on the same face as the bixbyite. Classic Thomas Range!
Previous data
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