Early 20th century cushion cut sapphire and diamond cluster ring, c.1915

Early 20th century cushion cut sapphire and diamond cluster ring, c.1915
Price: £20,000-£50,000
Ref No. 04243
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Description
, 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 treatment
Cluster 16 x 15mm / 5/8 x 9/16''
Weight: 6g
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