I wanted to find out about these myself, but I've had no joy. I can't even find anything terribly similar really.
They're 30cm tall, and a pair I guess, as I found them together and they're so similar although not identical. Satin finish, all vaseline/uranium body with a pearline top. There's no real irridescence, although it does look a little like it in some lights. Small, neat concave pontil mark to base, no other identification there.
I toyed with the idea of Rinsdkopf and Loetz (alright! Way off the mark I expect!) and although I did find something slightly vaguely similar on Mike Moir's site, it was too much of an obscure (for me) designer for me to track down.
Are they simply Stourbridge-type Victorian vases? Or something else? Then don't seem typical...
Note: I am skint at the moment, so could be selling these.
There will be the usual 'Big thanks to the Glass Message Board' if I list them. :angel:
Edit: Both vases have dimples, only one is less pronounced.