I bought on sale the chain ring "Blue Tear" size 5...

I bought on sale the chain ring "Blue Tear" size 52. At the reception it was so great that I went to check with a jeweler. It was a size 60. Not to mention that it was marked on private sale as being 18 carats while on the certificate of authenticity it is well marked that it is 9 carats. Very disapointed. I return everything and get a full refund.