Stolzite
Seagraves Mine, Seafoam Mining District, Custer County, Idaho, USA
2.6 x 1.8 x 1.3 cm. Stolzite is a rare secondary mineral in the oxidized zones of hydrothermal tungsten-bearing lead deposits. Yellow and yellow-orange micro-blades of stolzite richly cover three sides of the black matrix. The matrix also has a sprinkling of sharp, tiny green botryoids of an unknown mineral. This piece is from a very uncommon, old ...
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