Home Dumortierite
VIII - Nesosilicates
Crystal habit of Dumortierite

Name   Dumortierite
Chemistry   (Al,Fe)7[O3|BO3|(SiO4)3]
Hardness   3.5
Lustre   silky
Colour   deep blue, brownish red
Streak   white 
Density [g/cm3]   3.3
Crystal habit   orthorhombic, crystals columnar, fibrous, prismatic
Cleavage, Fracture   [100] good, [110] indistinct
other characteristics and occurrences   in aluminium rich metamorphic rocks, also contact metamorphic formation

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