Sterling silver 925 over bronze Larimer ring size 7

Beautiful sterling silver over bronze Larimar ring size 7. I believe this is genuine Larimar as the stone feels cold to the touch however it is not solid sterling silver even though it is stamped at 925. I have scratch/acid tested this ring and it is sterling silver over bronze. You will see a slight area on the back of the band where the bronze showing from me scratching it to test it, but it is barely noticeable. Due to the fact that this is not solid sterling silver I am selling this is a costume jewelry piece