18ct Diamond Cluster Ring18ct diamond cluster ring with a central slightly raised brilliant cut diamond weighing an estimated 0. 18ct with a slightly lower surround of six brilliant cut diamonds each weighing an estimated 0. 07ct. Total diamond content estimated as 0. 60ct. Colour estimated as H I. Clarity estimated as SI1. The cluster measures 9. 4mm in diameter and is attached to a wide shouldered tapering shank, graduating at base, finger size L. Fully hallmarked London