A group of jewellery

A group of jewellery, comprising: a pair of amethyst and cultured pearl earrings, post fittings, length 2.8cm each, stamped 750; a pair of diamond hoop earrings, post fittings, length 2.7cm each, stamped 14K; a 19th century gold, ruby and sapphire dragonfly pendant, length 3.2cm including pendant bail, converted into pendant; a 9ct gold ruby half eternity ring, size K, British hallmark; and a 19th century amethyst brooch in a foiled setting, diameter 1.5cm