- Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese fields, Northern Cape Province, South Africa
- Thumbnail, 1.8 x 1.3 x 1.2 cm
A superb cluster of very lustrous Gaudefroyite crystals, some of the best I have ever seen in terms of sharpness and arrangement in thumbnail size. The largest of the well-formed crystals is a full 1 cm tall, and several of the crystals in the cluster are doubly-terminated. It is a full-sized thumbnail, overall. Ex. Charlie Key.