Natrojarosite, Chlorargyrite and Mimetesite crystals from Empire, Colorado, USA. 1 unique flat
The offered flat contains a varied collection of tellurium-related and associated minerals from the historic mining district of Empire, Colorado. The specimens display yellow Natrojarosite crystals together with Chlorargyrite and Mimetesite crystals in a range of crystal habits on matrix. The collection features attractive yellow, ochre, grey and brown colours and provides an excellent representation of the diverse mineralization from this classic locality. The pictured flat shows the exact collection being offered.
Geology & Origin
The Empire mining district in Colorado is one of North America's classic localities for exceptionally diverse oxidation-zone mineral assemblages. Weathering of primary silver, lead and tellurium-bearing ores produced numerous rare secondary minerals. Natrojarosite, Chlorargyrite and Mimetesite commonly occur together with other oxidation minerals, illustrating the complex geochemical processes within the deposit. Specimens from Empire are highly regarded by collectors because of their interesting mineral associations and the historical importance of the locality.
Abbreviations commonly used in mineralogy.
| Abbreviation | Meaning |
| xl | single crystal, possible with matrix |
| xls | noticeable crystals |
| (xl) | embedded or damaged |
| (xls) | embedded or damaged |
| MASS | massive and/or amorphous pieces |
| TYP | type locality of the original description |
| SWUV | shortwave-UV-reaction |
| UV | ultraviolet reaction |
| SC | self-collected |
| U | unique (single unique piece) |