'This lustrous source of radium & uranium derives its name from its tar-like appearance'
pitchblende
THE ROCK: This lustrous source of radium & uranium derives its name from its tar-like appearance
This lustrous source of radium & uranium derives its name from its tar-like appearance
This lustrous source of radium & uranium derives its name from its tar-like appearance
THE ROCK
pitchblende
THE ROCK