An aquamarine, diamond and onyx set cocktail ring

claw set with an emerald-cut aquamarine in a border of small round brilliant-cut diamonds and an onyx surround, each shoulder set with small round brilliant-cut diamonds, to a plain shank, stamped 750 (Dimensions: Ring size: N/O, estimated total gem weights: aquamarine 6.60cts, diamonds 0.36cts)

(Ring size: N/O, estimated total gem weights: aquamarine 6.60cts, diamonds 0.36cts)