Bright green Dioptase on a matrix of white Calcite in an aesthetic small cabinet form. Altyn Tyube, meaning 'Golden Hill' in the local Kazakh language is an ancient copper bearing location with its associated minerals Malachite, Cuprite and Dioptase. An interesting old stock piece. Altyn-Tyube deposit, Kirghiz Steppes, Qaraghandy Oblysy, Kazakhstan. 2" x 1" x 1", 1.2 oz.