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Mineralpedia Details for Bixbyite

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Bixbyite

Bixbyite

Named after Maynard Bixby, the mineral dealer from Utah, USA who provided the first specimens. Bixbyite can be found in lithiophysal, caused by expanding gasses, cavities in rhyolite, and in metamorphosed manganese ore. Bixbyite is an uncommon mineral that can be found in localities in the United States, Mexico, Spain, Germany, Sweden, India, South Africa, Zimbabwe, Namibia, and a few additional localities. Associated minerals include topaz, spessartine, beryl, quartz, Sanidine, pseudobrookite, hematite, and beraunite.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/bixbyite.pdf

Formula
Mn3+2O3 
Crystal System
Isometric 
Crystal Habit
Crystalline - Fine, Massive - Granular 
Cleavage
Imperfect, Imperfect, Imperfect 
Luster
Metallic 
Color
black 
Streak
black 
Class
Isometric - Diploidal 
Fracture
Uneven 
Hardness
6-6.5 
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Bixbyite from Thomas Range, Juab Co., Utah, United States

Bixbyite
            from Thomas Range, Juab Co., Utah, United States

Perfect lusterous black, cubic crystal to 5mm perched nicely atop quartz rhyolite matrix.

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Bixbyite from Wessels mine, Hotazel, Kalahari Mn fields, Northern Cape Province, South Africa

Bixbyite
            from Wessels mine, Hotazel, Kalahari Mn fields, Northern Cape Province, South Africa

Solid silvery mass of all Bixbyite with 5-6mm cubic crystals. Bixbyite is an ore of manganese.

Click thumbnail images for larger view.

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