Granted, genuine Tiffany jewelry is stupidly expensive. However, companies that make "replica" jewelry that has "Tiffany & Co." or "T. and Co." is infringing on Tiffany's copyrights and thus breaking the law. Why not find someone (craft fair?) whose jewelry is stunning and unique, and doesn't cost an arm and a leg?

Part (not nearly all) of the high price tag on Tiffany jewelry is paying for the excellent quality of their work, too - almost any "replica" you'll find is going to be lower quality. To put it simply: unless you're just trying to show off, it's not worth the time looking.