Bismuth is a brittle metal with a silvery white colour when freshly produced, but in its natural crystalline form it has a beautiful stair-step spiral look which shines in a rainbow of colours. It is used in jewellery, as an ingredient in some potions, and as an alloying ingredient in a number of metals.
It is rumoured that Zaboom is collecting large amounts of this metal for, if any, an unknown purpose.