|a silver-white mineral consisting of a telluride of gold and silver in the form of elongated striated crystals: a source of gold in Australia and North America. Formula: (Au,Ag)Te2|
|[C18: from (|
|a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.|
|a gadget; dingus; thingumbob.|
a gold and silver telluride mineral [(Au,Ag)Te2] in which the ratio of gold to silver atoms is commonly close to 1:1. It is a member of the krennerite group of sulfides and is found associated with them in ore veins formed at low temperatures in Hungary, Australia, Canada, and the western United States. It forms monoclinic crystals. For detailed chemical properties, see sulfide mineral (table)
Learn more about sylvanite with a free trial on Britannica.com.