Home Staurolite
VIII - Nesosilicates		 Crystal habit of Staurolite Crystal habit of Staurolite Staurolite
 
Name   Staurolite
Chemistry   2FeO·AlOOH·4Al2[O|SiO4]
Hardness   7 - 7.5
Lustre   vitreous - dull
Colour   reddish brown, dark brown, yellow brown, brownish black, browish yellow
Streak   colourless 
Density [g/cm3]   3.8
Crystal habit   orthorhombic, crystals columnar, twins [031] ~60°, [232] ~90°
Cleavage, Fracture   [010] distinct, fracture conchoidal
other characteristics and occurrences   typical metamorphic mineral (medium grade temperature, amphibolite facies), sometimes grown on kyanite (Al[6]Al[5][O|SiO4] = Al2SiO5)
   
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 © 2004 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst
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