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Mineralpedia Details for Ilvaite

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Ilvaite

Ilvaite

Formula
CaFe2+2Fe3+OSi2O7(OH) 
Crystal System
Orthorhombic 
Crystal Habit
Striated, Columnar, Massive 
Cleavage
Distinct, Distinct, None 
Luster
Sub Metallic 
Color
iron black, dark grayish black 
Streak
brownish black 
Class
Orthorhombic - Dipyramidal 
Fracture
Uneven 
Hardness
5.5-6 
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Ilvaite from South Mountain dist., Owyhee Co., Idaho, United States

Ilvaite
            from South Mountain dist., Owyhee Co., Idaho, United States

Tiny black crystals of Ilvaite with 4mm Siderite rhombs.

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