Uranophane, Autunite, “Gummite”: Ruggles mine, Grafton, Groton Co., New Hampshire USA

Description

Species: Uranophane, Autunite, “Gummite”

Locality: Ruggles mine, Grafton, Groton Co., New Hampshire USA

Dimensions: 13.5 x 12.5 x 6.5 cm.

A nice large specimen of colorful secondary uranium minerals from the famous Ruggles mine, Grafton, Groton Co., New Hampshire USA. Measures ~60,000 CPM on my Ludlum model 3 survey meter with the 44-9 probe. Ex. Mount Holyoke College (Massachusetts). Rare!!