look on e-bay...I found a tiffany & co braclet a few weeks back it 1 very close to it was selling for $19... silver is not worth a whole lot even when made by a big name brand unless it is very old.
If its a tiffany & co I would take it to an antique dealer who specializes in Jewelry and find out what it would go for at auction, and I don't mean E-bay. You could have a real valuable piece.
RR