Edwardian sapphire and diamond coronet cluster ring, French, circa 1910.
Edwardian sapphire and diamond coronet cluster ring. Set to center with an oval old cut natural unenhanced sapphire in an open back claw setting with a weight of 1.43 carats, surrounded by ten cushion shaped old mine diamonds in open back claw settings with a combined approximate weight of 1.20 carats, flanked by two cushion shaped old mine diamonds in open back grain and rubover settings with a combined weight of 0.20 carats. The total approximate combined diamond weight of 1.40 carats to an elegant coronet cluster design featuring curving claws, an impressive pierced gallery and fancy oval open backholing, leading to smooth shoulders and a solid D-shaped shank. Marked as 18 carat yellow gold and tested platinum, French, circa 1910, accompanied by The Gem and Pearl Laboratory report #20422.