The meaning of PITCHBLENDE is a brown to black mineral that consists of massive uraninite, has a distinctive luster, contains radium, and is the chief ore-mineral source of uranium.

Uraninite, also known as pitchblende, is a radioactive, uranium -rich mineral and ore with a chemical composition that is largely UO 2 but because of oxidation typically contains variable proportions of U 3 O 8.

Pitchblende, also known by the name uraninite, is a mineral comprised mainly of oxides of the element uranium, UO 2, and UO 3. It is the primary ore of uranium. The mineral is black in color, like 'pitch'.