1) Mineral 2) Silver mineral 
Argyrodite is an uncommon silver germanium sulfide mineral with formula Ag8GeS6. The color is iron-black with a purplish tinge, and the lustre metallic. Discovered by Clemens Winkler in 1886,{sfn|Spencer|1911|p=488} it is of interest as it was described shortly after the element germanium was isolated, 15 years after it had been postulated by Mend...
heavy, dark sulfosalt mineral, a silver and germanium sulfide (Ag8GeS6), in which the element germanium was discovered (1886). It is a relatively ...
[n] - a rare steel-gray mineral consisting of silver and germanium and sulfur
noun a rare steel-grey mineral consisting of silver and germanium and sulfur