Ca. 500-400 BCA striking carved carnelian bull's head mounted on a high karat yellow gold swivel (not full rotation) ring. Looks fantastic when worn and is certainly wearable on special occasions.Size: D: 18.51mm / US: 8 5/8 / UK: R; 8.64gProvenance: Property of a private London collector; formerly in Kirby collection, acquired pre 2000. The item has undergone X-ray fluorescence analysis to confirm the metallurgical content suggesting its ancient origin and lack of modern trace elements.