Hausmanite on Andradite . (Kalahari Manganese Fields, South Africa)
N'Chwaning 2 Mine, Kalahari Manganese Fields, South Africa. 40mm x 25mm x 10mm.
These specimens came out in 1999 (January) they are well documented as a few f them where also associated with Datolite.
Andradite is a calcium - iron rich variety ogf Garnet..
The white would be very microscopic Barite that is a known associated mineral at this find.