I bought a pair of earrings. Beautiful vintage ones. I got home and used my loop and it had 575 engraved on the earrings instead of 14 KT gold. I communicated with the owner..I looked on Goggle and educated myself on the European ratings on gold. I was happy and satisfied. I never called or emailed. Didn’t think about it then. Shortly after that the owner called me and was concerned about my purchase.i told her I was very pleased.