Thorogummite, Zircon, Monazite: Seerie-Cooper mine, South Platte District, Jefferson Co., Colorado USA

Description

Species: Thorogummite, Zircon, Monazite

Locality: Seerie-Cooper mine, South Platte District, Jefferson Co.,
Colorado USA

Dimensions: 12.9 x 8.3 x 4.3 cm, 484 grams

Ex. Mark Wilson Collection

Large, rich specimen of a very complex, interesting assemblage of REE and U/Th minerals from an unusual Colorado locality. Measures ~50,000 CPM on my Ludlum Model 3 Geiger Counter with the 44-9 probe. Rare!!