This flat with Scorodite and associated minerals from the Gold Hill Mine in Utah, USA represents a typical assemblage of arsenic bearing secondary minerals from this historic mining region. The specimens mainly consist of light gray to slightly greenish mineral aggregates with fine grained to compact textures.
Many of the pieces display pale surfaces with slightly vitreous to dull luster and locally brown to rusty weathering zones. These color variations are commonly produced by oxidation processes affecting arsenic and iron bearing minerals. The variety of specimens illustrates different expressions of the mineralization and provides a representative overview of material from this locality.
Geology & Origin
The Gold Hill Mine in Utah belongs to a historic mining district within the Tintic mining region. The deposits formed through hydrothermal processes in which metal rich fluids circulated through fractures and cavities in the host rocks. This resulted in the formation of numerous ore minerals and their secondary alteration products. Scorodite is a typical secondary mineral formed by the weathering of arsenic bearing primary minerals and commonly occurs as compact to fine grained aggregates.