The listing, Vintage Ring marked NV has ended.
Not antique but vintage. I think this ring is an AVON product. It is marked NV and when I researched that online others were acquainting it to Avon. I have never seen NV on a piece of jewelry so you might know more. It is definitely a costume jewelry piece. It is marked a size 6 but it fits easily on my size 7 finger. I would bid on it as a size 7. The marquis cut stone is a fake something! I don't know what but it does sparkle a lot even though I couldn't capture that in the pics.