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Calcite, Chalcedony (watermelon rock)
Oglala Grasslands, Sioux county, Nebraska
356,5 grams and 12,5 x 7 x 5,5 cm
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Calcite, Chalcedony (watermelon rock)
Oglala Grasslands, Sioux county, Nebraska
356,5 grams and 12,5 x 7 x 5,5 cm