the geometric design of elongated rectangular form with flared anthemion shaped ends and central square cluster upon a parallel lines, pierced and openwork featuring a central oblique square cut diamond to a cut-corner frame of square and circular cut stones, the twin lines channel set with square cuts supporting ladder style a six spaced old round brilliant cut diamonds, edged linear black enamel detail, mounted in platinum and with white gold fittings, signed 'J. MARCHAK PARIS' and numbered 1247, French assaymark and possibly partial workshop mark, approximately 9.50cts of diamonds in allLength 8.2cm / 3ΒΌ''
Width 1.7cm / 11/16''Weight: 18g
19th century emerald and diamond openwork scroll knot brooch, French c.1880, the central upright figure-of-eight set with cushion cut diamonds, entwined by a looping line of rectangular cut emeralds, open set in gold, French gold assaymark and partial workship mark to pin, pendant hooks to verso, approximately 3.45cts diamonds in all, approximately 6.00cts of emeralds