Carnotite: Uruvan Mining District, Montrose County, Colorado, USA

Species: Carnotite

Locality: Uruvan Mining District, Montrose County, Colorado, USA

Dimensions: 19.1 x 5.5 x 3.6 – 514 grams

Ex. Bob Werner Collection 

Quite large, very rich specimen of bright yellow Carnotite (showing some tiny but well-formed crystals!) from the classic Uruvan Mining District, Montrose County, Colorado, USA. Not powdery unlike a lot of samples of this mineral. Measures ~90,000 CPM on my Ludlum Model 3 Counter with the 44-9 probe. Rare!