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Mineralpedia Details for Kanonaite

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Kanonaite

Kanonaite

Formula
Mn3+AlOSiO4 
Crystal System
Orthorhombic 
Cleavage
Indistinct, None, None 
Luster
Vitreous (Glassy) 
Color
greenish black 
Streak
gray green 
Class
Orthorhombic - Dipyramidal 
Hardness
6.5 
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Kanonaite from Salm-Château, Vielsalm, Stavelot Massif, Luxembourg, Belgium

Kanonaite
            from Salm-Château, Vielsalm, Stavelot Massif, Luxembourg, Belgium

These little grass green arreas are described as "anhedral nodular porphyroblasts" and are about 0.75mm in diameter. They are formed in low-grade metamorphic environments and form a series with andalusite and are polymorphous with sillimanite and kyanite. It is rare and found in only five worldwide occurences.

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