Barite, 5 cm, from the “A” bed, 2100-foot level of the Magma mine, Superior, Pinal County, Arizona. Ex collection of Harry Quaas (1897–1991); Jeff Scovil photo.
Magma Mine, USA - a renowned underground copper locality yielding barite, pyrite, and calcite on dark matrix; coveted high-grade specimens for collectors.
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