Natrozippeite, Uraninite: Thompsons Mining District, Grand County, Utah, USA

Description

Species: Natrozippeite, Uraninite
Locality: Thompsons Mining District, Grand County, Utah, USA
Dimensions: 8 cm x 2.5 cm x 1.5 cm

Fine, colorful, rich specimen of yellow (and yellow-fluorescent) natrozippeite crusts and microcrystals (as labeledl) on black, uraninite-rich or perhaps asphaltite-rich sandstone. Eric Quinter specimen U/Th 0714, pictured on Mindat.org. Rare!