Beautiful Vintage Cabochon Amethyst Poison Ring Signed JESUS TAX (Taxco Mexico)Mex and Sterling. The Ring is hinged with a large cabochon amethyst on the top of the ring, it is adjustble, and there is an eagle 3 mark on the inside of the shank. It is approx a size 8 at the moment, and the patina is super. It is 1 inch along the finger, and the raised silver ball design is lovely.