Home Glauconite
VIII - Phyllosilicates (Mica Group)
Crystal habit of Glaukonite

Name   Glauconite
Chemistry   (K,Na)(Fe3+,Al,Mg)2[(OH)2|(SiAl)4O10]
Hardness   2
Lustre   dull
Colour   olive green, black green, bluish green
Streak   white
Density [g/cm3]   2.2 - 2.8
Crystal habit   monoclinic, crystals tiny
Cleavage, Fracture    
other characteristics and occurrences   glauconite = Fe-rich illite
also grained, earthy, foliated, in marine sediments close to the coast

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