Took a chance on a ring.. the picture was crappy and the center has a few small chips. I should be getting it in a few days but I'm super excited and wanted to share
I think it's 20's-30's (at least I hope it is) and I'll get better pictures when I have it in hand.
It is looking better already. Very pretty! I don't imagine Birks would use a lab created stone. If it is a synthetic, my guess is that it was replaced at some point.