EMERALD AND DIAMOND RING, LORENZ B?UMER Octagonal step-cut emerald, baguette-cut diamonds, gold (French mark), ring size 4? with band ring sizer, signed Lorenz B?umer Paris, black Lorenz B?umer case SSEF, 2017, report no. 95303: approximately 5.3 carats, Colombia, minor oil US$25,000-38,000