Uraninite: Jáchymov, Karlovy Vary District, Karlovy Vary Region, Czech Republic

Species: Uraninite
Locality: Jáchymov, Karlovy Vary District, Karlovy Vary Region, Czech Republic
Dimensions: 4.5 cm x 3.5 cm x 3.5 cm

Superb large, very dense, pure specimen of botryoidal uraninite variety pitchblende from the classic Czech locality of Jachymov! Eric Quinter specimen U/Th 0427, pictured on Mindat.org. Measures ~180,000 CPM on my Ludlum Model 3 Counter with the 44-9 probe. Eric Quinter specimen U/Th 0026, pictured on Mindat.org. Weighs 150 grams. Rare!!