horizontally oriented and hung with a pear shaped facetted drop, all crimp-collet open set with ropetwist borders, mounted in gold testing as 18ct, French gold mark and partial workshop markLength 4.6cm / 1¾''
Width 2.4cm / 15/16''
Principal topaz approximately 20.5 x 18.0 x 7.60mmWeight: 10g
Art Deco diamond and rock crystal panel brooch by Boucheron, Paris, of geometric design formed of stepped overlaid polygonal crystal and diamond panels, the larger crystal septagon panel base topped by a pave diamond hexagon and a crystal pentagon, all pierced through and with diamond geometric join pave set with baguette and round brilliant cut diamonds, mounted in platinum and white gold to the hinged clip to back, this signed 'Boucheron Paris', with French assaymarks and indiscernible workshop mark