Bismuth

Bright, mirror-like cleavages of native bismuth are nicely visible on this rock fragment from the famous Cobalt Camp. Native bismuth was a frequent associate mineral in the silver veins.

Silver was discovered on the shores of Cobalt Lake in the summer of 1903. Within a few years, Cobalt became one of the world's largest silver producers, supplying an astonishing 333 million ounces, or more than 10,000 tonnes, of silver by 1922 from 100 mines.