This is another find which has me stumped! It seems to be clear glass which has been rolled in uranium powder/frit and then reheated. The outer surface of the tankard is slightly bumpy where the speckles are, the inside surface is totally smooth.
The base glass is not UV reactive, the speckles glow under a blacklight. There is a large irregular polished pontil mark.
Height is 4" (100mm), weight is 469g.
Has anyone seen this sort of uranium speckling before, and any idea of maker please?