Bismuth, a brittle metal with a silvery-white color, is found in the earth’s ... such as the thin oxide layer on a bismuth crystal. As light waves bounce off these layers, they interfere with ...

2). Bismuth is mainly found in the ores bismuthinite (bismuth sulfide) and bismite (bismuth oxide), but also occurs in its elemental state, in the form of crystals with an oxide layer of varying ...