Ettringite, Rhodochrosite
Thumbnail, 2.6 x 1.7 x 1.1 cm
N'Chwaning Mines, Kuruman, Kalahari manganese fields, Northern Cape Province, South Africa

The Kalahari Manganese fields have produced great Ettringites over the years. This lovely thumbnail, with a rich lemon-yellow color and excellent hexagonal habit, fits right in. The luster is powdery-matte, not dull though. Partially contacted, on one face in back, otherwise complete. Ex. Charlie Key.