ˈvərbəˌīt noun
( -s )
Etymology: German vrbait, from Karel Vrba died 1922 Bohemian mineralogist + German -it -ite
: a mineral TlAs 2 SbS 5 consisting of a sulfide of thallium, arsenic, and antimony and occurring in small gray-black to dark-red orthorhombic crystals