Calcite “fish-tail” twin, 21.1 cm, from the Gordon mine, Picher, Ottawa County, Oklahoma. Ex Richard Brown collection, ex George Witters collection. Displayed at the 'American Mineral Treasures' exhibit at the 2008 Tucson Gem and Mineral Show.
Picher Field, USA - premier lead-zinc locality in the Tri-State District; resinous sphalerite on chert, sharp galena, and prized paragenesis for collectors.
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