An antique diamond brooch attributed to Coulon,

Coulon brooch

in the form of a stylised rose, set with swirling rose diamonds  centring an old brilliant cut diamond, against an oxidised sliver trellis

Leon-Alphonse-Auguste Coulon, was a former employee of Boucheron who entered into a partnership with Boucheron’s designer Jules Debut.

4cm across.

Paris, circa 1900.