A collection of jewellery

A collection of jewellery, comprising: a sapphire and diamond cluster ring, the cushion-cut sapphire within a surround of old cushion-cut diamonds, mounted in platinum and gold, size M 1/2; a diamond half-hoop ring, set with two rows of round brilliant cut diamonds, mounted in 18ct yellow and platinum, rubbed hallmarks, size approx O 1/2; a blue stone and diamond pendant necklace, the oval-cut blue stone within a surround of round brilliant cut diamonds to a fine link yellow gold chain, pendant stamped DC 14K 585, chain stamped RJ 18KT, pendant length 2.2cm including bail, chain length 45cm; and a diamond pendant, the three round brilliant cut diamonds mounted in white gold, to a silver fine link chain, clasp stamped 925, pendant length 2cm, chain length 44.5cm