Calcite
Ives Quarry, Racine, Racine County, Wisconsin, USA
10.5 x 5.1 x 3.0 cm. Mineral specimens are rare from this obscure Wisconsin limestone aggregate quarry. Very glassy, transparent to translucent scalenohedrons, to 4.7 cm, in a jackstraw pattern cover this sculptural large plate. The striking interior phantoms in the larger crystals really add character to this very fine two-sided specimen.
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