Fluorite Cubes on Calcite, Pint's Quarry, Raymond, Iowa

Scalenohedral calcite crystals with minor marcasite and small, brown/amber, cubic fluorite crystals, on limestone matrix. From Pint's Quarry, Raymond, Black Hawk Co., Iowa. This specimen shows a similar fluorescent response under all UV wavelengths- the calcite fluoresces a soft honey-yellow with zones of purple, and the fluorite cubes show a bright cream/white response. Both minerals are also phosphorescent. 66 x 46 x 27 mm, 67 grams.

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