Edwardian Sapphire and Diamond Crossover Ring, circa 1910.
Edwardian sapphire and diamond crossover ring. Set with a cushion shape old cut natural unenhanced sapphire in an open back claw setting with an approximate weight of 1.60 carats, further set with a cushion shape old mine diamond in an open back claw setting with an approximate weight of 1.00 carats, further adorned by eight cushion shape old mine diamonds in open back grain settings with a combined weight of 0.60 carats. The total approximate diamond weight is 1.60 carats, to an impressive crossover design featuring curving claws, a pierced gallery and fancy open backholing, flanked by trumpeting shoulders with millegrain edging flowing through a tapering D-shape shank. Marked 18 yellow carat gold and platinum, circa 1910, accompanied by Gemmological Certification Services (GCS) report #5782-833.