A Medieval Byzantine Garnet and Gold Men’s Signet Ring, Byzantine Empire, circa 5th–8th centuries. Image courtesy Romanov Russia.

This one-of-a-kind ancient gold stirrup-shaped ring is bezel-set with an oval flat top cabochon cut garnet. Surrounded by a row of small gold beads flanked by two larger gold beads. Weight 5.72 grams. Ring size 9.25. Price: $7,500.