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