Unique OAK turquoise ring

This is a very unique ring, with two turquoise stones inset in a purposefully "aged" silver toned ring band. I don't think think the stones are genuine turquoise, not really sure what they are. I purchased this ring from an artist on etsy years ago. Not necessarily valuable for its materials, but just a super unique, one of a kind, handmade piece of jewelry. Size 6