A large diamond and synthetic sapphire set brooch/pendant, the pierced work millegrained navette-shaped panel set throughout with graduated old brilliant-cut diamonds to two principal pear-cut diamonds and calibré-cut synthetic sapphire accents, with a detachable double pin brooch fitting and a detachable collet set old brilliant-cut diamond bale, on fine belcher-link chain, pendant length, including bale, 62mm, the principal pear-cut diamonds weigh approximately 1.35-1.5 carats each. £5,000-£7,000