Pair of Marc by Marc Jacobs Cocktail Rings

Purchased at the Marc Jacobs store on Bleecker Street in NYC No box Some wear and tarnishing. The black ring was wore more and shows more signs of wear. Still lots of life left (see photos I tried to get the wear) My best guess is these are around a size 6 - at the time of purchase they were sold as one size fits all. I can’t find any branding on the rings themselves.