Like New 10K Gold Plated Butterfly Ring With Opal Inay, Size 7.25

One of a kind butterfly ring with blue opal inlay. Good quality. In like new condition. Size 7.25. Looks like it is 10K white gold plated. There is a 10K engraving on the inside, as pictured, but I don't think it is real solid gold, but rather gold plated (and it is not magnetic, so not sure if the metal underneath is 925 sterling silver, or some base metal)