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The color of pitchblende makes it easy to find it.
Yes. Pitchblende contains one gram of radium per seven tons. It is radioactive.
No. Pitchblende is an ore of Uranium. It's been a long time since plutonium occured in nature.
pitchblende was the first, but any good uranium ore will do as it is a daughter element of uranium's decay.
in ore of pitchblende