Dolomite (variety cobalt-bearing dolomite)

Bou Azzer Mines, Bou Azzer mining district, Ouarzazate Province, Drâa-Tafilalet Region  Morocco

Specimen size: 5.6 × 4.2 × 2.8 cm = 2.20” × 1.65” × 1.10”
Main crystal size: 0.4 × 0.3 cm = 0.16” × 0.12”