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Mineralpedia Details for Wickmanite

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Wickmanite

Wickmanite

Formula
Mn2+Sn4+(OH)6 
Crystal System
Isometric 
Crystal Habit
Octahedral Crystals 
Cleavage
None, None, None 
Luster
Vitreous (Glassy) 
Color
yellow, orange brown, yellow orange, colorless 
Streak
white 
Class
Isometric - Hexoctahedral 
Hardness
3-4 
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Wickmanite from Långban, Filipstad, Värmland, Sweden

Wickmanite
            from Långban, Filipstad, Värmland, Sweden

Yellow crystalline crusts. A fairly rare tin oxide.

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Wickmanite from San Martín mine, Sombrerete, Zacatecas, Mexico

Wickmanite
            from San Martín mine, Sombrerete, Zacatecas, Mexico

Very, very rich specimen with a hundred or so light yellow Wickmanite crystals to about 0.3mm on a frosted Quartz crystal group. Most all of the crystals are between the two blue arrows. A nice Calcite crystal group on the side to 1.2cm.

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