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Fassaite VIII - Inosilicates (Pyroxene Group)

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Name		Fassaite
Chemistry		CaMg[(Si,Al)2O6]
Hardness		6
Lustre		vitreous - greasy
Colour		black, greenish black, green
Streak		grey green
Density [g/cm3]		3.3 - 3.5
Crystal habit		monoclinic, crystals columnar, cross section octagonal, twins [100]
Cleavage, Fracture		[110] distinct (87°), fracture uneven
other characteristics and occurrences		fassait = augite variety with low iron content contact mineral in limestones, which were forced under high pressure

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

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