"Art Deco Plaque Brooch, Coral, Onyx And Diamonds."
A brooch with a floral motif, the pistils composed of red coral cabochons. The other motifs are made of onyx. The brooch is bordered with rose-cut diamonds. 18-karat yellow and white gold. Dimensions: 4.5 cm x 1.8 cm. French hallmark: Eagle's head and maker's mark: Wourms, LW, and a rosebud symbol. Art Deco period, circa 1928. Minor losses to the onyx. Delivered in a presentation box with an invoice. Free and insured shipping. I thank Mr. Jean Jacques Richard for identifying the hallmark. 
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Rivista Artiquariato