Sapphirine - angew. Mineralogie

Sapphirine
VIII - Nesosilicates

Kristallform von Sapphirin

`Name`		`Sapphirine`
`Chemistry`		`Mg₂Al₄[O₆\|SiO₄]`
`Hardness`		`7.5`
`Lustre`		`vitreous`
`Colour`		`blue, bluish grey, greenish grey or green`
`Streak`		`white`
`Density [g/cm³]`		`3.46`
`Crystal habit`		`monoclinic, crystals tabular, rarely foliated`
`Cleavage, Fracture`		`[101] perfect, fracture conchoidal`
`other characteristics and occurrences`		`formation by metamorphic convertion of aluminium and magnesium rich rocks (high grade metamorphism), together with cordierite (Mg₂Al₃[AlSi₅O₁₈])`

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

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