We added a blue bulb but you can make it whatever color you wish. The glass is we believe from Murano, blown and incamiciato (white glass) with three layers.
Unfortunately, there are no markings, but not all Morano glass from italy is marked that's where the problem is. By all means, do your own research. We are continuing our research on this item, and if we find that it is what we suspect a veart murano glass, the price will definitely double!! Take a snapshot of the lamp and put it in Google and you'll see what you find.