Hi, Mindat has their general locality as the Bobonong Subdistrict in Botswana. They are quite easily identified Vs agates from other localities. Hope this helps
Well, to be clear, Botswana agate in South Africa or part of historic collections is perfectly fine. Perhaps not in Botswana, or new production. If you have in an old collection in SA or the US though, it’s perfectly saleable!