About Metal Glasses :
There are serious research in Glasses made of Metal
The core ideia , from what I understood is that 'glass' is a kind of structure that is locally a crystal , in general, this make some space to light pass through easier if something don't capture the photons going through the material - what happens in metals very frequetly ; one easy way to understand this , with some 'approximation', is the kind of 'merged orbitals' of metals called bands whom make the life of some photons little troubled to enter in the metal.
I don't have read profoundly the articles, but I think that can be two things happening to easy the way through of the photons : or something like Franck Hertz experiment : https://www.wikiwand.com/en/Franck%E2%80%93Hertz_experiment or the graphene in the alloy 'traps' orbitals real closely to leave a 'room' for some traveling photons
Maybe some people whom works in that field can clarify for us the phenomena
A nice dome do build:
Very nice and imaginative question ! Besides the cost to build such alloy and the necessary engineering reaserch to make that great structure stable - what is not so easy and cheap - looks possible, and I hope the build this thing in our life time ! But we have so many barriers to surpass until we can afford that project ...
Some links like these tells you a bit about that :