You have to put them on one at a time, a shot of the rim and base and dimensions, in future someone might have the same piece of glass and it will easier for them and others to identify. The clue sometimes to identify a bit of glass might be in the base, the rim, the dimensions the texture, the wear, the damage, the technique used to make it, not just the overall look. I have about 500 bits of glass i have no idea who made them, it really is that difficult sometimes. regards Chris.
I think i might take a pick of all 500.