Paolo Costagli, topaz and diamond ring, of bombe design set with a cushion shaped white topaz, with estimated weight 9.30 carats, the Mount accented with round brilliant-cut black diamonds, estimated total diamond weigh 5.10 carats, signed Costagli New York, mounted in 18ct rose gold, diamonds untested for origin and natural colour, weight 15.5gm, ring size L.