Hi Anne, There is a green satin plinth which looks like yours (colour list doesn't show it as uranium though) in the Baker & Crowe book on Jobling Glass. Jobling made plinths in pink, blue, green, amber - either clear or satin, also in black, flint and jade. Jade was described as uranium moonstone glass. The plinth in the book photo is below a 2541 bowl with a semi-naked water-carrying female figural flower block.