Sterle sapphire and diamond dress ring, French, circa 1950.

Sterlé sapphire and diamond dress ring. Set centrally with a cushion shape old cut natural no heat Ceylon sapphire in an open back double claw setting with a weight of 8.67 carats, encircled by sixteen round transitional cut diamonds in open back claw settings with a combined approximate weight of 1.15 carats, further set with sixteen tapered baguette cut natural no heat sapphires in open back channel and rubover settings with a combined weight of 1.90 carats, adorned by thirty-seven round old cut natural no heat sapphires in open back claw settings with a combined weight of 2.75 carats, and decorated further by thirty-nine rectangular baguette cut diamonds in open back channel settings with a weight of 2.65 carats. The total approximate sapphire weight comes to 13.32 carats and the total approximate diamond weight comes to 3.80 carats to a striking sculptural design featuring a raised central coronet cluster, framed by smooth and sinuous craftsmanship and intricate open backholing the broad trumpeting shoulders which taper through to a solid shank with rope twist pattern throughout and C-clip. Marked platinum, signed 'STERLE PARIS', French, circa 1950, accompanied by Swiss Gemmological Institute (SSEF) report #130318.