A sapphire and diamond cluster ring. The oval-shape

A sapphire and diamond cluster ring. The oval-shape sapphire collet, with single-cut diamond surround and similarly-cut diamond accent shoulders. Estimated total diamond weight 0.40ct. Ring size L1/2.

A sapphire and diamond cluster ring. The oval-shape sapphire, with brilliant-cut diamond surround. Estimated total diamond weight 8.6 by 6.5 by 5mms. Estimated total diamond weight 0.30ct. Stamped 750

A sapphire and diamond cluster ring. The oval-shape sapphire, with a single-cut diamond openwork surround, similarly-cut diamond border and shoulders. Estimated total diamond weight 0.30ct. Ring size

A sapphire and diamond cluster ring. The oval-shape yellow sapphire, with brilliant-cut diamond surround. Estimated total diamond weight 0.45ct. Ring size M1/2. Weight 6.8gms.

A sapphire and diamond cluster ring. The oval-shape sapphire, within a single-cut diamond surround, to the plain band. Estimated total diamond weight 0.10ct. Ring size L1/2. Weight 3.3gms.

A sapphire and diamond cluster ring. The oval-shape sapphire collet, with brilliant-cut diamond scalloped surround and stylised fleur-de-lis shoulders. Estimated dimensions of sapphire 8.1 by 5.9 by 3

A sapphire and diamond cluster ring. The oval-shape sapphire, within an old-cut diamond surround. Estimated total diamond weight 0.20ct. Ring size L1/2. Weight 1.8gms.

A sapphire and diamond cluster ring. The oval-shape sapphire, within a brilliant-cut diamond surround, to the replacement 18ct gold band. Estimated dimensions of sapphire: 18.9 by 15.8, by 8.1mms. Est

A mid 19th century 18ct gold sapphire and diamond cluster ring. The oval-shape pink sapphire collet, within an old-cut diamond surround, to the plain band. Estimated total diamond weight 0.30ct. Weigh

A sapphire and diamond cluster ring. The oval-shape sapphire, within a graduated brilliant-cut diamond double surround, to the bifurcated shoulders and grooved band. Approximate sapphire dimensions: 1

A sapphire and diamond cluster ring. The oval-shape sapphire, to the single-cut and rectangular-shape diamond sides, with single-cut diamond border. Estimated total diamond weight 0.30ct. Weight 2.6gm

A sapphire and diamond cluster ring. The oval-shape sapphire, within a circular-cut diamond surround, to the plain band. Estimated total diamond weight 2.15cts, K-tinted, SI-P1 clarity. Weight 10.1gms

A sapphire and diamond cluster ring. The oval-shape yellow sapphire, to the rectangular-shape diamond sides and brilliant-cut diamond border. Approximate sapphire dimensions: 9.1 by 7.7 by 5mms. Estim

A mid 20th century 18ct gold sapphire and diamond cluster ring. The oval-shape sapphire, within an old-cut diamond border, to the trifurcated shoulders and plain band. Estimated total diamond weight 1

A mid 20th century 18ct gold sapphire and diamond cluster ring. The oval-shape sapphire, within a brilliant-cut diamond surround, to the tapered shoulders and plain band. Estimated total diamond weigh

A sapphire and diamond cluster ring. The oval-shape sapphire, within a brilliant-cut diamond panel surround, to the similarly-set diamond shoulders. Estimated total diamond weight 0.65ct. Weight 4.4gm

A sapphire and diamond cluster ring. The oval-shape sapphire, measuring 7.7 by 5.9 by 2.9mms, with rectangular-shape diamond sides and a brilliant-cut diamond border, to the tapered band. Estimated to

A late Victorian gold, sapphire and diamond cluster ring. The oval-shape sapphire, with old-cut diamond surround and stylised foliate sides. Estimated total diamond weight 0.65ct. Ring size K1/2. Weig

A sapphire and diamond cluster ring. The oval-shape sapphire, within a brilliant-cut diamond scalloped surround, to the single-cut diamond shoulder accents. Estimated total diamond weight 0.60ct. Weig

A sapphire and diamond cluster ring. The oval-shape sapphire, within a brilliant-cut and rectangle-cut diamond surround, to the plain band. Estimated total diamond weight 0.55ct. Weight 4.8gms.

An 18ct gold sapphire and diamond cluster ring. The oval-shape sapphire, within a brilliant-cut diamond surround, to the tapered shoulders and plain band. Estimated total diamond weight 0.85ct, I-J co

An 18ct gold sapphire and diamond cluster ring. The oval-shape sapphire, within a single-cut diamond surround, to the tapered shoulders and plain band. Estimated total diamond weight 0.30ct. Hallmarks

An 18ct gold sapphire and diamond cluster ring. The oval-shape sapphire collet, within a baguette-cut diamond border. Estimated total diamond weight 0.75ct, H-I colour, VS clarity. Hallmarks for Birmi

An 18ct gold sapphire and diamond cluster ring. The oval-shape sapphire, within a single-cut diamond surround, to the plain band. Estimated total diamond weight 0.45ct. Hallmarks for London, 1976. Rin