Nagyagite

This sample of nagyagite is displayed in the Smithsonian Museum of Natural History. Nagyagite is an sulfide mineral of gold,lead, antimony, iron and tellurium with the composition Au(Pb,Sb,Fe)₈(Te,S)₁₁ . This sample is about 4x4 cm and is from Sacaramb, Tranyslvania, Romania.