- Thaumasite (Doubly-Terminated)
- N'Chwaning Mine, Kalahari Manganese Field, Northern Cape Province, South Africa
- Thumbnail, 1.5 x 0.5 x 0.5 cm
- Ex. Josef Vajdak
A very nice pale yellow, transparent and zoned, elongated prismatic, doubly terminated, 1.5 cm long thaumasite crystal with an adjoining cluster of small thaumasite crystals. This is a fantastic thumbnail of this very rare silicate-carbonate-sulfate species from the Kalahari Manganese Fields.