Certainly unique...without any markings I'd have to guess costume jewelry, I'm no jewelry expert but from what (little) I've learned here, I've never seen anything newer with no markings that held any significant value. Not trying to bust your bubble newb, just trying to be honest. I'd love to say it was the long lost 24k Funky Fish ring of the defunct Nilly Willy tribe of the Aztec era...but IMHO jyst costume jewelry...albeit NICE costume jewelry...have fun, keep shopping, the good stuff IS out there...check out the garage sale and thrift store forums...Ddf