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An Art Deco corallium rubrum, jade, enamel and diamond brooch, circa 1930Estimate £5,000 - 7,000 (€6,800 - 9,600).  Photo: Bonhams.

Set to the centre with three horizontal corallium rubrum batons, between curved bands of black enamel and single-cut diamond-set spacers with jadeite terminals, suspending a plaque with pavé-set old brilliant-cut ground, centred by further stepped corallium rubrum batons, to a black enamel border, diamonds approximately 0.65 carat total, width 4.9cm 

Bonhams. FINE JEWELLERY, 24 Sep 2015 12:00 BST - LONDON, NEW BOND STREET