Chalcedony (Opaline) Kalahari Manganese Fields, South Africa.
N'Chwaning 2 Mine, Kalahari Manganese Fields, South Africa. 40mm x 40mm x 20mm.
"Opaline" Chalcedony from the Kalahari Manganese Fields is a ver rare occurance, we where lucky enough to acquire a few specimens from a find in late 2008. This is one of the better specimens as is clearly displayes the association of Chalcedony with he Manganese orebody. Note that under the SW UV light there is some activity as shown in the second image.