High luster botryoidal Pitchblende bubbles among Calcite. Also rich layers on the piece.
Uraninite var. Pitchblende, Calcite xx, Shaft 371, Schlema Hartenstein, Erzgebirge, Saxony, Germany
10.5 x 5.5 x 4.5 cm
428 grams
200,000 cpm on Radiacode 110