18ct bi-colour gold, aquamarine and diamond ring of cluster design, centring a collet-set emerald-cut aquamarine framed by a border of pave-set diamonds and two collet-set baguette diamonds, to a textured, bi-colour gold band, the aquamarine and diamonds together weighing approximately 6.00 carats and 0.48 carat respectively, size K, signed O'Brien 2001.