Gold telluride is a compound composed of gold and tellurium. It is often found in ore deposits and is a primary source of free gold. There are several synonyms for this mineral, including calaverite, krennerite, and sylvanite. Calaverite is a gold telluride mineral that is commonly associated with other minerals such as quartz and pyrite. Krennerite is another type of telluride mineral that contains gold, silver, and copper. Sylvanite, on the other hand, is a telluride mineral that contains gold and silver in varying proportions. These synonyms are often used interchangeably, but they refer to different forms of gold telluride with slightly different properties.