| Mineral | Cornwallite |
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| Formula | Cu5(AsO4)2(OH)4
|
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| Crystal Form | Monoclinic/Prismatic [2/m] |
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| Cleavage | Distinct/Good |
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| Color | Verdigis green, blackish-green, emerald-green |
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| Density | 4.2 – 4.6 g/cm3 |
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| Diaphaneity | Translucent, Opaque |
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| Fracture | Irregular/Uneven, Conchoidal |
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| Hardness | 4.5 |
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| Lustre | Sub-Vitreous, Resinous, Waxy, Greasy |
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| Streak | Apple green |
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| Type Loc. | Wheal Gorland, St Day United Mines, Gwennap, Camborne - Redruth - St Day Dist., Cornwall, England, UK |
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| Dana 8 Class | 41.4.2.2 |
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| Strunz Class | 7/B.11-40 |
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| Mindat | mindat.org |
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| WebMineral | WebMineral |
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| ID | 444 |
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