Fluorescent Calcite and Scheelite from the Ophir Hill Mine, Tooele County, Utah

Tabular calcite crystals and small scheelite octahedrons on limestone matrix, from the Ophir Hill Mine, Ophir, Tooele County, Utah. At its best under short wave UV, the calcite shows a beautiful, intense, red response, and the scheelite fluoresces bright blue/white. The calcite shows a similar, but brighter red/orange response under mid wave UV, but the scheelite is not fluorescent under this wavelength. The long wave UV response is similar to mid wave, but dimmer. This specimen measures 9.5 x 9.0 x 6.2 cm, and weighs 498 grams.

Located in the Oquirrh (pronounced like “ochre”) Mountains, southwest of Salt Lake City, Utah, the Ophir Hill Mine operated between 1870 and 1972, and produced lead, zinc, silver, copper, manganese, and tungsten.

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