He was standing there, to all appearances strictly on the job of making his charges work, when Philander came crawling up the rise into the pocket where this crew was mining the glossy, lustrous pitch-blank uraninite ore.
"Man of Many Minds"
E. Everett Evans
There were two other mines that produced the same uraninite ore as the one at which Hanlon was stationed.
"Man of Many Minds"
E. Everett Evans
Pitchblende or uraninite is an intensely black mineral of a specific gravity of 9.5 and is found in commercial quantities in Bohemia, Cornwall in England and some other localities.
"Marvels of Modern Science"
Paul Severing