Mineral: Autunite
Locality: Ruggles Mine, Grafton, Grafton County, New Hampshire, USA
Dimensions: 5.2 x 5.1 x 3.1 cm

Description: Pale yellow masses of autunite associated with black uraninite and brown zircon var. cyrtolite with small patches of darker yellow uranophane. The autunite fluoresces a vivid green helping to distinguish it from the uranophane, which does not fluoresce.

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