, millegrain set with a 4.06ct Ceylon sapphire, to two row diamond border of old single cuts, the inner border openwork, each collet set, the outer border in a collet channel, to openwork bifurcated shoulders with similar graduated diamonds, reeded shank, mounted in platinum, serial number 6554, French control mark for platinum (import/unknown origin), accompanied by a scanned copy of the SSEF report no. 125464 giving the Ceylon origin opinion for the 4.066ct sapphire and that it shows no evidence of heat treatmentCluster 16 x 15mm / 5/8 x 9/16''Weight: 6g
Early 20th century diamond and sapphire 'eye' cluster ring, French c.1910, with an old European cut diamond brilliant to centre, approximately 0.90ct, flanked by tapering calibre cut sapphires in a millegrain scalloped edged border of small old single cut diamonds, mounted in platinum, trace of French assaymark and workshop mark
Diamond, sapphire and gold stepped bombe ring, French, workshop mark for Henri Lavabre, in the form of a broad arching scroll pave set with calibre sapphires and topped by a carre cut square diamond, approximately 1.45ct,