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V - Carbonates
Crystal habit of Calcite Crystal habit of Calcite Calcite Calcite Calcite Calcite Calcite

Name   Calcite
Chemistry   CaCO3
Hardness   3
Lustre   vitreous
Colour   white, colourless, extremly variable
Streak   white 
Density [g/cm3]   2.6 - 2.8
Crystal habit   trigonal, extremly variable, twins [0112], [0001]
Cleavage, Fracture   [1011] perfect
other characteristics and occurrences   iceland spar (double refraction effect)
coarse to fine-grained, dense, rarely fibrous, oolitic, encrusted, reacts with cold acid (HCl) (cf. dolomite)

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