Can anyone tell me anything about this piece? It was in a rather wet environment and everything around it, bronze, copper nickel etc had corroded or rusted and this piece was in good condition. From my limited research I saw an identical one with different stones listed as being 18k gold and rather old, possibly late 1800's. It's slightly smaller than a quarter. One stone looks to be a ruby or garnet and the other possibly a diamond. No markings but I think that the markings on these were on the ring that holds the chain but I can't see any. Any info or educated guesses welcome.