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Zoisite VIII - Sorosilicates (Epidote Group)

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Name		Zoisite
Chemistry		Ca2Al3[O|OH|SiO4|Si2O7]
Hardness		6
Lustre		vitreous
Colour		grey, apple green, brown, blue, red
Streak		white
Density [g/cm3]		3.2 - 3.4
Crystal habit		orthorhombic, crystals long, prismatic, striated, tabular
Cleavage, Fracture		[001] perfect, fracture uneven to conchoidal
other characteristics and occurrences		thulite   = pink (Mn2+-content) tanzanite = blue (Cr-, Sr-content) anyolite  = green in metamorphic rocks at high pressure and high temperature (eclogite-facies)

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

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