Found these two rings for $5 a piece. The first one has a real opal stone, not sure on the red ones although they look like something for sure. No gold wearing off anywhere, no markings either, to me it looks like 9k or 10k, but could definitely be gold filled. The second ring has what looks to me an old amethyst, again no gold wearing off. Looks very old and is tarnished. Weird thing is that I have a solid 14k wrist watch from 1915 that tarnished in the same exact way.....