An Art Deco onyx, jade and diamond rouge pot, by Boucheron, of polished rounded octagonal onyx form, the hidden circular lid centred with a carved jade flowerhead, within a millegrained rose-cut diamond set surround, the lid released by a button to the underside, the inner gold rim signed ‘Boucheron - Paris’ and bearing French eagle’s head assay mark, with mirror to inside of lid, width 48mm. £500-£700