Polybasite

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A loose grouping of brilliant lustrous bright metallic platy crystals of polybasite. No matrix, in good condition. Very choice thumbnail for this famous Mexican locality.The Taxco mining district in Guerrero, Mexico, features complex geological formations where mineralization occurs largely within limestone and schist units, hosting significant historic metal deposits. Within this district, the Guerrero I Mine and its El Solar shaft have long served as prominent localities for mineral collection, yielding fine specimens of native silver along with associated minerals like galena, sphalerite, quartz, and calcite. Mining operations in the area date back centuries, driven by the rich hydrothermal vein systems that made Taxco one of the most famous silver-producing regions in North America.