Autunite, Uraninite, Muscovite: Bob Ingersoll mine, South Dakota

Description

Species: Autunite, Uraninite, Muscovite

Locality: Bob Ingersoll mine, Keystone, South Dakota

Dimensions: 4.9 x 3.4 x 4.5 cm. (78 grams)

Ex. Chet Lemanski Collection

Fine specimen of vivid green and yellow autunite and uranophane on a matrix of muscovite and uraninite from the Bog Ingersoll pegmatite near Keystone, South Dakota. Measures ~85,000 CPM on my Ludlum Model 3 Counter with the 44-9 probe. Rare and Classic material!