(Fe,Mg,Zn)2Al9(Si, Al)4O22(OH)2
Color: brown
Hardness: 7-7.5
Streak:
Colorless to gray
Cleavage: 1
Luster: non-metallic
Other Properties: crystals typically cross and are coffin-shaped in cross-section
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Staurolite
(Fe,Mg,Zn)2Al9(Si, Al)4O22(OH)2 Color: brown Hardness: 7-7.5 Streak: Colorless to gray Cleavage: 1 Luster: non-metallic Other Properties: crystals typically cross and are coffin-shaped in cross-section |
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