Grayite
Brabant Farm 168, Karibib Constituency, Erongo Region, Namibia
Bought from Dipl.Kfm. Mathias Rheinlaender (Mikon) at Tucson Gem and Mineral Show 2018. I bought another piece of this first, which he said he personally collected. However, it is supposed to be Th232 but was clearly U238. After returning and discussing this with him he explained that he had a boulder that he broke up and sent in a piece for ...