| Gunningite | |
| Category: | Sulfate minerals |
| Imasymbol: | Gun[1] |
| Strunz: | 7.CB.05 |
| Dana: | 29.6.2.5 |
| System: | Monoclinic |
| Class: | Prismatic (2/m) (same H-M symbol) |
| Symmetry: | C2/c |
| Color: | White to colorless |
| Cleavage: | Indistinct |
| Mohs: | 2.5 |
| Luster: | Vitreous |
| Diaphaneity: | Translucent |
| Gravity: | 3.195 |
| Opticalprop: | Biaxial (+) |
| Refractive: | nα = 1.570 nβ = 1.576 nγ = 1.630 |
| References: | [2] [3] [4] |
Gunningite is one of the minerals in the Kieserite group, with the chemical formula . Its name honours Henry Cecil Gunning (1901–1991) of the Geological Survey of Canada and a professor at the University of British Columbia.[3]
Gunningite is rare. It is found in dry areas of the oxidized portions of sphalerite-bearing deposits. It has been noted in mines in Canada (Yukon Territory, British Columbia and New Brunswick), the United States (Nevada and Arizona), Switzerland (Valais), Greece, Attica and Germany (Baden-Württemberg).