I've had this a while. Difficult to get a good glamour shot because of the decor. Anything that looks like pale blue enamels is in fact lilac enamels btw. It's an utterly beautiful decor. Amethyst interior, enamels swirled and full of bubbles, then cased in something but I don't think it's clear. Looking through the foot it has a greeny yellow tinge to the cased glass.
It's marked with an engraved 2 on the base and is missing it's original lid (came with a silver plated lid instead and I knew it was missing when I bought it). It's a powder bowl missing it's lid, but a great shape as a vase.
The base glass is not cobalt blue, blue, blue john, dark blue or any kind of blue

it's a deep amethyst, and not that translucent at all - I had to shine a single bulb very close up behind it to get it to pick up translucency on the camera, and to show the colour.
It has a small integral foot that reminded me of my Daum Jades bowls however the polished pontil mark is much larger than those. Kind of Stevens and Williams larger, nearly fills the whole foot. Loads of wear around the thin edge of the foot. It's old.
I felt when I bought it that it was Webb Corbett Agate Flambe. However looking at all the pics on the net, I don't know whether it's just the decor is difficult to photograph in a representative way, but I could not get mine to look like any of the pics I've found. I still feel it could be, but it's not quite right somehow. Perhaps it is a different version in the range?
Then I stumbled upon this vase (see link), sold in 2005 as Steuben Moss Agate. I'm not sure it is. I've no idea if it is. I thought it might be Webb Corbett Agate Flambe perhaps as well? But whatever it is I would like to know because the hand that made this vase, made my bowl

Is it a Stevens and Williams decor maybe?
http://jamesdjulia.com/item/lot-698-steuben-moss-agate-vase-61112/So ... if any wise person can tell me I'd be extremely grateful.
Thanks so much
m