Home Chloritoid
VIII - Nesosilicates		 Crystal habit of Chloritoid
 
Name   Chloritoid
Chemistry   Fe2+3Al4[(OH)|O2(SiO4)]2
Hardness   6.5
Lustre   pearly
Colour   green grey, green black, greyish black, dark green, dark grey
Streak   green grey 
Density [g/cm3]   3.5 - 3.8
Crystal habit   monoclinic, crystals foliated with hexagonal shape
Cleavage, Fracture   fracture conchoidal
other characteristics and occurrences   ottrelite  = Mn-rich variety
sismondine = Mg-rich variety
in regonal metamorphic rocks (schists, marbles) of low pressure
   
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 © 2004 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst
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