Mercury possesses an abundance of rare and heavy metals that are rare on Earth and unknown in other parts of the Solar System, including: copper; Yttrium, used for armaments (The Demons of Darkside); pitchblende, from which Radium and Uranium can be extracted (A World is Born); and the rare radioactive crystal known as the sun-stone (Shannach – the Last).
The NICO Clean Tobacco Card was a device exported from Japan to the United States in the 1960s, consisting of a small card impregnated with uranium ore.