Tetradymite is a mineral consisting of bismuth, tellurium, and sulfide. It belongs to the sulfide mineral group with the chemical formula Bi2Te2S. There are a few synonyms for the word Tetradymite, including tellurbismuth, bismuthtelluride, and tellurobismuthite. These synonyms are mainly used in the field of geology and mineralogy while discussing the properties and characteristics of Tetradymite. They indicate variations of the same mineral, and their usage depends on the context of discussion. Regardless of the synonym used, Tetradymite is a fascinating mineral with unique characteristics and properties.