A quantity of jewellery items

A quantity of jewellery items, including a modern amethyst riviere necklace, the slightly graduated oval-shaped amethysts are mounted in silver gilt cut-down collets, 48cm, with a similar citrine mounted silver gilt necklace, 39cm, a similar white topaz-mounted silver-gilt necklace, 40Cm, and three silver-gilt bar link necklaces, all mounted with assorted gem pendants, 39, 42 and 46cm, a yellow gold ring set with sections of lapis lazuli stamped 'M, 750', two yellow gold rings alternately-set with raised assorted stones and stamped 'M, 750', a 9ct gold ring mounted with an iridescent stone with London marks and tamped 'M, 375', a gold ring mounted with raised sections of lapis lazuli stamped 'M, 375', and a square-form gold ring mounted with hardstone to each side, total weight of six rings, 75g