The mark that I can see is RJ. It is an Avon ring and it is several years old and when it was bought for me it said Sterling Silver and CZ. Also the same ring is selling on two sites right now that those sellers say the exact same thing. So it is either STERLING SILVER or Avon conned a whole lot of people. Also I am allergic to almost all metals (including gold) and I wore this ring for 10 years without issue.