18ct gold, tanzanite and diamond pendant necklace, the openwork textured shield motif, centring a collet-set heart-cut tanzanite weighing approximately 4.50 carats, supporting a collet-set brilliant-cut diamond drop and surmounted by a marquise-cut diamond, the diamonds together weighing approximately 0.90 carats, length approximately 48 mm, suspended from a byzantine link chain in 14ct gold, length approximately 670 mm.