Bismuth

Bismuth is a high-density metal. Elemental bismuth occurs as metallic crystals associated with nickel, cobalt, silver, tin, and uranium sulphide ores. Bismuth is found in the ores bismuthinite, bismite, and bismutite from Peru, Japan, Mexico, Bolivia, England, Norway, Brazil, and Canada.
The solid-state structure of bismuth is monoclinic. It is not normally necessary to make bismuth in a laboratory seeing as it is available commercially usually found in nature as bismite, bismuthinite, and bismutite. It is generally made as a byproduct of copper, lead, tin, silver, gold and zinc plants.

Bismuth has no biological role. bismuth is considered to be stable, although It is actually radioactive with an extremely slow rate of decay.