Don't buy the jewelry
My first trip to Italy was on a foreign study program ran by Dartmouth College. I was in Florence and I thought buying some gold jewelry on the Ponte Vecchio was a no-brainer. The bracelet I bought my mom and girlfriend were a little expensive but looked great. A little after 5 months, the bracelets began stretching and the gold threads began coming apart.
Thankfully, about 9 months later, I had to go to Italy again for my Thesis research. I decided to take the bracelets back to the stores for warranty repairs. The manager was absolutely obnoxious, first he claims that the bracelets had a 3 months warranty, then he claimed that the golden threads on the bracelet broke because of heavy use, then I demanded to talk to a more senior manager (out of the 14 jewelry stores on the bridge, 12 are owned by the same company). The senior manager was even worth, he practically called me an idiot for thinking that a bracelet shouldn't break in such a short time. He kept on saying how if his car broke down after 6 months he wouldn't go to the dealership for a refund so why should I.
Maybe they treated me like trash is because I am so young (22), and the bracelets combined to have cost less than 500 euros. Maybe towards their more senior and wealthy customers they would treat differently. But the Jewelry on the bridge is overpriced and they sell all the same stuff. Go off the bridge and the stores there sell the exact same stuff and it's much cheaper, this way you don't have to pay the "bridge fee". After my horrendous experience on the bridge, I've always told my friends to never go there.