Estate 14K Yellow Gold 6x3mm Marquise Blue Sapphire and Diamond Halo Ring14K Yellow Gold 6x3mm Marquise Blue Sapphire and Diamond Halo Ring. Features . 05cttw of round single cut included diamonds, accenting a 6x3mm marquise cut blue sapphire. Weighs 1. 41 DWT, finger size 7. Sapphire abraided, priced as is. This pre owned item is from our Estate Collection and is a one of a kind piece. Size may be able to be modified upon request for an additional charge, please message us with your requests.