Early 20th century cushion cut emerald and diamond cluster ring by Marcus, American c.1910

Early 20th century cushion cut emerald and diamond cluster ring by Marcus, American c.1910
Price: £20,000-£50,000
Ref No. 04086
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Description
, the octagonal step cut emerald in a cushion border of small old round brilliant cut diamonds meeting and extending as two lines down the shoulders, pierced detail and decoration, millegrain set, mounted in platinum, signed 'MARCUS', the emerald approximately 1.25ct, the diamonds approximately 0.40cts in all
Cluster length 11mm
Emerald approximately 6.8 x 6.5 x 4.2mm
Weight: 5g
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S.J. Phillips