Early 20th century emerald and diamond brooch by Caldwell, American c.1910

Early 20th century emerald and diamond brooch by Caldwell, American c.1910
Price: £20,000-£50,000
Ref No. 04130
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Description
centred by a principal old round brilliant cut diamond in diamond foliate cluster, to a four-row emerald line ground, channel set with square cut stones, outer line border of single cut diamonds, millegrain set in platinum, signed 'JEC & Co', serial number possibly Z8072, the principal diamond approximately 1.25ct
Length 5.3cm / 2 1/8'' Width 1.7cm / 5/8'' Central diamond approximately 6.9 x 6.7 x 4.25mm
Weight: 13g
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S.J. Phillips