Big Glass Ring (Or maybe polished stone?)

NOTE: Necklace gone, ring still available (see last pic for close-up). Very Large ring, looks like it could be engraved. I can almost fit two of my wee fingers in the ring (not sure what size it is, but not for tiny hands, that's for sure - could definitely fit a very big finger!) Open to selling for cash, trading for things I'm In Search Of (ISO), or some combination thereof. Please check my other listings if you'd like to bundle and see the ISO List on my profile (https://www.karrotmarket.com/ca/users/t52pc61mo9sz/) if you'd like to propose a trade. Thank you!