- N'Chwaning Mines, Kuruman, Kalahari manganese field, Northern Cape Province, South Africa
- Thumbnail, 1.2 x 0.5 x 0.5 cm
- Ex. Kay Robertson
Thaumasite is a rare cousin of Ettringite, with the very best examples found at the N''Chwaning Mines. This terminated gem crystal is typical of the finds there: high quality and gemmy thumbnail crystals that are lustrous, sharply hexagonal, and aesthetic.