A sample of Uranium ore conglomerate from Ontario Canada..The uranium is the dark material between the large quartz pebbles..Uranium ore is also called pitchblende. Pitchblende is a form of the uranium ore (uranium oxide). This highly radioactive black ore is made up of uranium (U) and oxygen (O) in the chemical formula U3O8. As an uranium source it is important for the nuclear industry. .This is part of a series. The other images in the series show the radiation from this specimen.
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