This looks like an artisan piece... very popular in NYC... A friend of mine is a jewelry maker and she has done pieces like this in 14K and 18K. I am going to forward this picture to her because crazy enough I have seen this same ring in her collection. If this is her ring, btw she doesnt have gold markings on her rings either even though they are 100% gold, this ring probably cost about $1200. As for the stones, she just told me that she does glue her stones... everything is hand made and its hard to created claws or screw the stone. Do test the gold....