The texture of your mica looks very, very like a bit of Loetz I have. I'm not positive it is mica, it just looks like snow covered branches of trees.
It's
kind of white and
kind of silver and
kind of all pillow-y soft, and leads to a bumpy but smooth surface on the glass.
It's clear with silvery white mica-ish bits and had had a silver metal electroplated lining (Now all blackened and much was scratched off before it became mine.)
I've searched and found the pattern was called Schaumglas, an Eduard Prochaska technique.
And searching for that, I've found bits with coloured strapping on.
Just need to confirm the shape now, I hope.
