sorry, not sure Anne if you're suggesting this might be Opaline, which I would doubt - Opaline should give the 'sunset glow' (when held up to strong sunlight), rather than the fluorescence of uranium under uv - I think. This piece, I think, this is the jade type of uranium, which means quite old, possibly, but regret no idea as to origin.
I think I disagree with this
Uranium green translucent glass can also be called green opaline glass. The fact it is uranium and fluoresces does not make it not opaline glass.
This is translated from the book Baguier e Verres a Boire du XIXe siecle ,
Leon Darnis, pp63'
The edge of the cup 8 presents undulations. The leg is shaped balustre. The green apple opaline green chrysoprase was called because of its resemblance to the color of a variety of chalcedony, chrysoprase, gemstone particularly popular in the XIX th century'Opaline glass comes in many, many colours. They are usually translucent in appearance. Sometimes they are nearly opaque though (see Le Cristallerie de Clichy).
I don't know if Anne's vase is French. The pontil but flat polished rim is a bit confusing. That would lead me to think Bohemian rather than French ... (however, without any real evidence to go on, my thoughts would be that the shape isn't so Bohemian and perhaps more French but the polished rim makes me think not - no quotes please, I'm always wrong).
Does it have a polished pontil mark or is it a snapped off pontil mark?
Anne, perhaps also check out Josephinenhutte and Schachtenbach?
m