| Argentojarosite | |
| Category: | Sulfate mineral |
| Formula: | AgFe(SO)(OH) |
| Imasymbol: | Agjrs[1] |
| Strunz: | 7.BC.10 |
| Dana: | 30.2.5.5 |
| System: | Trigonal |
| Class: | Ditrigonal pyramidal (3m) |
| Symmetry: | R3m |
| Color: | Yellow, yellow-brown, brown |
| Habit: | Coatings, fine-grained masses |
| Cleavage: | distinct |
| Mohs: | 3.5-4.5 |
| Luster: | Vitreous |
| Opticalprop: | Uniaxial (-) |
| Pleochroism: | Dichroic, O: Yellow, E: Pale yellow |
| Streak: | Light yellow |
| Gravity: | 3.66 |
| Density: | 3.66 (measured), 3.81 (calculated) |
Argentojarosite is an iron sulfate mineral with the chemical formula AgFe(SO)(OH). It is one of few iron sulfate minerals containing silver in its chemical formula as a dominant element.[2] Its type locality is the East Tintic Mountains, Utah.[2] [3]