Sylvanite was also discovered in Romania, in the Baia de Aries (Offenbánya) region of Transylvania. It was first described in 1796, and was later named after the Transylvania region.

Where is sylvanite found?

Sylvanite is found in Transylvania, from which its name is partially derived. It is also found and mined in Australia in the East Kalgoorlie district. In Canada it is found in the Kirkland Lake Gold District, Ontario and the Rouyn District, Quebec.

Where is calaverite found?

Calaverite is most commonly found in veins that have formed at low temperatures, as in sites at Kalgoorlie, Australia; Cripple Creek, Colo.; and Calaveras county, Calif., for which it is named. It crystallizes in the monoclinic system.