Mineralpedia Details for Cornetite
Cornetite
Belgian geologist Jules Cornet is the namesake of the mineral Cornetite. It is a rare mineral that forms in some oxidized copper deposits in localities in the Democratic Republic of the Congo, Zambia, Zimbabwe, the United States, Chile, Mexico, and Australia among a few others. Mineral associated with Cornetite include copper, brochantite, pseudomalachite, libethenite, malachite, atacamite, chysocolla, and heterogenite.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/cornetite.pdf
- Formula
- Cu3PO4(OH)3
- Crystal System
- Orthorhombic
- Cleavage
- None, None, None
- Luster
- Vitreous (Glassy)
- Color
- greenish blue, dark blue
- Streak
- blue
- Class
- Orthorhombic - Dipyramidal
- Fracture
- Brittle
- Hardness
- 4.5
- WebMineral
- View Cornetite
- Mindat
- View Cornetite
Cornetite from Star of the Congo mine, Lubumbashi, Shaba, Congo
Dark blue, lustrous, flat radial aggregates to 4mm.
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Cornetite from Yerington, Lyon Co., Nevada
Deep blue, lustrous very microcrystalline Cornetite. Crystals are less than 0.5mm.
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Cornetite from Katanga Cu Crescent, Katanga, Democratic Republic of Congo
Deep blue compact crystals of Cornetite with dark green Malachite.
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