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A seldom seen Calcite from the Osceola Mine along the Animas River near Silverton. This specimen features sharp, well-formed rhombohedra of Calcite up to 1.2 cm that have a medium chocolate-brown coating of an unknown manganese oxide. Additionally, the crystals are sitting on excellent quality, lustrous, GEM / gemmy Quartz prisms on matrix. From the collection of T. M. Phetteplace (specimen #1161) originally purchased from the famous Columbine Mineral Shop in Ouray, Colorado. Ex. T. M. Phetteplace collection Specimen# CO712B160
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🇺🇸 Ship from USA · On Agora since 2026
$225.00