nagyagite
/ˈnadʒəɡʌɪt/ /ˈnaɡjəɡʌɪt/ /ˈnɒdʒəɡʌɪt/Mineralogy
noun
A monoclinic (pseudotetragonal) telluride, antimonide, and sulphide of lead and gold, occurring as dark grey tabular crystals.
Origin
Mid 19th century; earliest use found in James Nicol (1810–1879), geologist. From German Nagyagit from Nagyág, the name of the mineral's locality (formerly in Hungary, now Săcărîmbu in Transylvania, Romania) + -it.