Hello and welcome.

I think this might be lampwork, and given your location, I wonder if it might be Lauscha?
It looks as if it might be made from two pieces of hot glass though, which worries me a bit.
There is a difficult technique, called incalmo, which joins to different pieces of hot glass together but I do not know if that is possible in lampwork - and this looks a bit as if it could be amber and blue glass, joined while still hot.
I'm not a lot of help!
Hopefully, somebody else here might know more.
