- Thumbnail, 1.7 x 0.9 x 0.7 cm
- Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese fields, Northern Cape Province, South Africa
- Ex. Charlie Key
An exceptionally large single crystal of Gaudefroyite. Jet black and highly lustrous; it is one of the largest and best single crystals of the species I have seen, from anywhere. Ex. Charlie Key stock.