Miniature, 3.2 x 1.4 x 1.4 cm
Brazzaville (Reneville; Djoue), Brazzaville Department (Reneville Department), Republic of Congo (Brazzaville)

This is a single huge compound crystal of dioptase - just extremely rare in this size (nearly an inch and a half long). Though it is from Congo, it has fine "Tsumeb-like" color and luster over most of its surface, though there are some jumbly areas where subcrystals have formed and natural clean contact on one side where it grew against another crystal.