Usage examples (18)

• Certain minerals, such as uraninite, cannot form under significant exposure to oxygen.
• Pitchblende or uraninite is an intensely black mineral of a specific gravity of 9.5 and is found in commercial quantities in
• This led Davidson9 to conclude that the uraninite bearing rocks are not placer riverine deposits, as is suggested by Tamzek.
• He already knew ore -- the glossy, sub-metallic, pitchy black luster of uraninite or pitchblende; the yellows of autunite and carnotite; the variant and confusing greens...