| The first discovery of pitchblende in the United States was associated with gold ores at the Wood mine in Gilpin County. |
| He was probably one of the few Canadian prospectors of that time who could have identified the pitchblende mineral. |
| More illusive than gold and many times more precious, radium, the product of pitchblende, had somehow gotten into his blood. |
| 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. |
| During the early years of radium and uranium refinery operations in Port Hope, highgrade pitchblende ores were processed. |
