An excellent thumbnail specimen of Tennantite from Tsumeb featuring several sharply formed tetragonal crystals, intergrown and ranging in size from 1.9cm to 0.4cm. Whilst Tennantite is the one of the main ores at Tsumeb, most specimens tend to be dull and crudely formed - this specimen shows good metallic lustre, and well formed sharp crystal shape. The Tennantite has grown on a Galena base.