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Gerhardtite
- Formula
- Cu2NO3(OH)3
- Crystal System
- Orthorhombic
- Cleavage
- Perfect, Good, None
- Luster
- Vitreous (Glassy)
- Color
- green, dark green
- Streak
- light green
- Class
- Orthorhombic - Disphenoidal
- Hardness
- 2
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Gerhardtite from Caledonia mine, Ontonagon Co., Michigan, United States
Bright blue thin coatings with other unidentified minerals.
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Gerhardtite from Likasi mine, Katanga, Democratic Republic of Congo
Cobalt blue acicular crystals 3mm.
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