An amethyst and diamond brooch, 18ct yellow and white gold, made as a large oval plaque brooch, centred by a large cabochon amethyst of intense deep purple colour, measuring 16 x 13 mm, weighing approximately 12.00cts, bezel set in white gold, framed by claw set brilliant cut diamonds, twenty-six stones totalling 0.39ct, completed with a pierced cobweb like surround of gold work with additional twelve diamonds set throughout, fitted with pin