| Tyrolite | |
| Category: | Arsenate and carbonate minerals |
| Imasymbol: | Tyl[1] |
| Strunz: | 8.DM.10 |
| Class: | Prismatic (2/m) (same H-M symbol) |
| Symmetry: | P2/c (no. 13) or C2/c (no. 15) |
| Color: | Blue to green |
| Habit: | Radial or botryoidal |
| Mohs: | 1.5–2.0 |
| Luster: | Vitreous |
| Diaphaneity: | Translucent |
| Gravity: | 3.1–3.2 |
| Refractive: | nα = 1.694 nβ = 1.726 nγ = 1.730 |
| References: | [2] |
Tyrolite is a hydrous calcium copper arsenate carbonate mineral with the formula CaCu5(AsO4)2CO3(OH)4⋅6H2O. Tyrolite forms glassy, blue to green orthorhombic radial crystals and botryoidal masses. It has a Mohs hardness of 1.5–2.0 and a specific gravity of 3.1–3.2. It is translucent with refractive indices of nα = 1.694, nβ = 1.726, and nγ = 1.730.
It is a secondary mineral formed by the weathering of associated copper and arsenic minerals. It was first described in 1845 for an occurrence in Schwaz, Tyrol, Austria.