Home Turquoise
VII - Phosphates		 Crystal habit of Turquoise Turquoise
 
Name   Turquoise
Chemistry   CuAl6[(OH)2|PO4]4·4H2O
Hardness   5 - 6
Lustre   waxy - vitreous
Colour   blue, blue green, green, green grey, or light blue
Streak   pale bluish white 
Density [g/cm3]   2.6 - 2.8
Crystal habit   triclinic, crystals rarely
Cleavage, Fracture   [001] perfect, [010] good
other characteristics and occurrences   in fissures of strongly altered Al2O3-rich rocks containing sulfides
   
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 © 2004 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst
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