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: 7.8 x 6 x 5.3 cm. (292 grams)

Ex. Jack Nieburger Collection

A nice large, very rich specimen of high-grade uranium ore from the famous Schwartzwalder mine, Golden, Jefferson County, Colorado. Very nice example of this uncommon material. Quite HOT, measuring ~200,000 CPM on my Ludlum Model 3 counter with the 44-9 probe. Rare!