gemma-antiqua:A collection of ancient Roman rings, all of which are gold save for the ring in the mi
gemma-antiqua:A collection of ancient Roman rings, all of which are gold save for the ring in the middle of the top row, which is gilt bronze. The rings with gems have cabochons of either amethyst, carnelian, and glass. They all date to sometime between the 2nd to 3rd centuries CE. Image from Bonhams. -- source link