Aquamarine, double halo Ring

Valuation $5,100
18ct gold cluster ring with a 2.1mm to 4.5mm wide shank which splits three ways at the shoulders.  The head is in a cushion shaped halo style with a double tier of diamonds.  The centre is set with a 9.2mm x9.1mm x5.0mm deep (2.45 cts, which corresponds to the AQ2.45 engraved in the shank) cushion cut medium blue aquamarine.  Around the aquamarine is set with sixteen 0.03 ct brilliant cut G/H/I. S.I diamonds.  Total weight 0.79ct which corresponds to the DO 0.79 engraved inside the shank.  Ring weight 6.94gms