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Mineralpedia Details for Jeanbandyite

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Jeanbandyite

Jeanbandyite

Named for Mrs. Jean Bandy of Arizona, USA who translated Agricola’s De Natura Fossilium from Latin, along with the help of her husband Mark Bandy. Jeanbandyite is a rare mineral that can be found only in localities in Bolivia, Mexico, Canada, and newer localities in England. It occurs in oxidized zones of polymetallic hydrothermal deposits.

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

Formula
(Fe3+,Mn2+)Sn4+(OH,O)6 
Crystal System
Tetragonal 
Crystal Habit
Crystalline - Coarse, Striated, Pseudo Octohedral 
Cleavage
Good, Fair, None 
Luster
Vitreous - Adamantine 
Color
brown orange, red brown, pale yellow 
Streak
light yellow 
Class
Tetragonal - Dipyramidal 
Hardness
3.5 
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Jeanbandyite from Siglo Veinte mine, Llallagua, Bolivia

Jeanbandyite
            from Siglo Veinte mine, Llallagua, Bolivia

Tiny micro yellowish orange crystals to about 0.2mm, blocky in nature without much form. At least one has a little octahedral form.

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Jeanbandyite from Hingston Down quarry, Gunnislake, Cornwall, England

Jeanbandyite
            from Hingston Down quarry, Gunnislake, Cornwall, England

A tiny creamy octahedral crystal to about 0.75mm.

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Jeanbandyite from Mt. Pleasant mine, Charlotte Co., New Brunswick, Canada

Jeanbandyite
            from Mt. Pleasant mine, Charlotte Co., New Brunswick, Canada

Murky yellow, crude tetragonal dipyramids to about 0.5mm. There are numerous crystals all over the specimen. I am not sure what the brownish yellow spherical groups are. The matrix is Fluorite.

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