Uraninite var. Pitchblende, Hematite: Schwartzwalder mine, Golden, Jefferson County, Colorado USA

Description

Species: Uraninite var. Pitchblende, Hematite

Locality: Schwartzwalder mine, Golden, Jefferson County, Colorado USA

Size: 8.2 x 4.7 x 4.6 cm. (~254 grams)

Ex. Jack Nieburger Collection

Nice rich example of pitchblende uraninite ore with hematite and minor pyrite, cut on one face, from the famous Schwartzwalder mine, Golden, Jefferson County, Colorado USA. Measures around 90,000 CPM on my Ludlum Model 3 Counter with the 44-9 probe. Rare!