Dioptase and Calcite, Tsumeb Mine, Namibia, Mined circa late 1980's, Ron Roberts Collection #AF-13, Miniature, 2.0 x 4.0 x 6.0 cm, $45. Online Jan. 17.
Cluster of lustrous calcite rhombs with preferential inclusions of dioptase. Tiny chaff on one crystal and minor nicks towards bottom edge. Collected c. late 1980's. ex: Ron Roberts Collection #AF-13.