A collection of tanzanite

A collection of tanzanite, sapphire and diamond jewellery, comprising: a sapphire and diamond demi-parure of earrings and necklace, set with oval sapphires and brilliant-cut diamonds, necklace length 31cm, earrings length 2.4cm, post fittings; a sapphire and diamond pendant designed as an oval enclosing a lozenge, set with circular-cut sapphires and brilliant-cut diamonds, length 3.9cm; a tanzanite and diamond demi-parure of earrings and a ring, each set with an oval tanzanite within a border of marquise-shaped diamonds, earrings length 17mm each, post fittings, size O; a tanzanite, sapphire and diamond ring, size M; and two sapphire and diamond rings, sizes O and P, each stamped 750