| The most common ore of the element is pitchblende, although it is also present in other minerals, such as uraninite, carnotite, uranophane, and coffinite. |
| With his dog team on his second journey in search of pitchblende he had traveled fifty miles, and the day was still young. |
| The first discovery of pitchblende in the United States was associated with gold ores at the Wood mine in Gilpin County. |
| It would take a deposit of pitchblende richer than anything I've ever heard of to penetrate the lead. |
| The hint of a new element in pitchblende materialized in July 1898, when the couple reported gathering a substance that was 400 times more active than metallic uranium. |
| It is worth recalling the history of this treatment, which began when American, James Douglas, discovered extensive pitchblende deposits on his Western mining properties. |
