Home Johannsenite
VIII - Inosilicates (Pyroxene Group)
Crystal habit of Johannsenite

 
Name   Johannsenite
Chemistry   CaMn[Si2O6]
Hardness   6
Lustre   vitreous
Colour   brown, brown black, greenish, grey, grey green
Streak   greenish grey 
Density [g/cm3]   3.6
Crystal habit   monoclinic, crystals prismatic, elongated
Cleavage, Fracture   [110] good (87°)
other characteristics and occurrences   in metamorphic limestones and skarn
   

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© 2004 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst
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