A sapphire and diamond cluster ring, claw-set with an oval-cut sapphire of deep bluish-green colour,

A sapphire and diamond cluster ring claw-set with an oval-cut sapphire, in a single border of graduated round brilliant-cut diamonds, to a plain unmarked shank (Ring size: K)

A sapphire and diamond cluster ring, the oval cut sapphire claw set within a border of fourteen single cut diamonds to a plain tapered shank, size N, stamped '18ct'

An aquamarine, sapphire and diamond cluster ring claw-set with an oval-cut aquamarine, in a border of round brilliant-cut diamonds, each shoulder set with a heart-shaped sapphire, to a plain band, sta

GREEN SAPPHIRE AND DIAMOND CLUSTER RING The oval-cut green sapphire set within a brilliant-cut diamond surround, mounted in 18 carat gold, diamonds approx. 0.60ct total, partial UK hallmark, European

An 18ct gold sapphire and diamond cluster ring, An 18ct gold sapphire and diamond cluster ring, an oval mixed cut sapphire, approximately 5.40mm x 8.00mm, claw set to the centre of a surround of round

A SAPPHIRE AND DIAMOND CLUSTER RING set with an oval cut sapphire of 1.67 carats, in a cluster of round brilliant cut diamonds, no assay marks, sizing beads, size I / 4, 3.3g.

A CEYLON NO HEAT SAPPHIRE AND DIAMOND CLUSTER RING set with an oval cut blue sapphire of 3.39 carats in a cluster of round brilliant cut diamonds, no assay marks, size M / 6, 4.5g. Accompanied by a ge

A sapphire and diamond three-stone ring claw-set with an oval-cut sapphire and two round brilliant-cut diamonds, the plain band stamped PLAT; with accompanying report by Gemmological Certification Ser

A YELLOW SAPPHIRE AND DIAMOND CLUSTER RING in platinum, set with an oval cut yellow sapphire of 2.50 carats in a cluster of round brilliant cut diamonds, further diamonds accenting the shoulders all t

AN ANTIQUE SAPPHIRE AND DIAMOND CLUSTER RING in yellow gold, set with an oval cut sapphire of approximately 1.09 carats in a cluster of rose cut diamonds, no assay marks, size I1/2 / 4.5, 2.4g. 

NO RESERVE - A SAPPHIRE AND DIAMOND CLUSTER RING in yellow gold, set with an oval cut sapphire in a cluster of round brilliant cut diamonds, indistinct full British hallmarks, size J / 4.75, 1.5g.

AN 18 CARAT WHITE GOLD SAPPHIRE AND DIAMOND CLUSTER RING an oval-cut green-blue sapphire within a border of round brilliant-cut diamonds. Estimated total diamond weight 0.50ct, hallmarked London 1977,

A SAPPHIRE AND DIAMOND CLUSTER RING in 18ct white gold, set with an oval cut sapphire of approximately 4.11 carats in a cluster of round brilliant cut diamonds all totalling 1.4-1.6 carats, stamped 18

A SAPPHIRE AND DIAMOND CLUSTER RING in 18ct yellow gold, set with an oval cut sapphire of 1.53 carats in a cluster of old cut diamonds, each shoulder set with a further old cut diamond, the diamonds a

A VINTAGE SAPPHIRE AND DIAMOND CLUSTER RING in 18ct yellow gold, set with an oval cut sapphire of 0.65 carats, in a border of round brilliant cut diamonds, full British hallmarks for 18ct gold, size K

A SAPPHIRE AND DIAMOND CLUSTER RING in 18ct yellow gold, set with an oval cut sapphire of 1.67 carats in a cluster of round brilliant cut diamonds, British hallmarks, size O / 7, 4.6g.

A VINTAGE SAPPHIRE AND DIAMOND CLUSTER RING in 18ct yellow gold, set with an oval cut sapphire of 0.65 carats, in a border of round brilliant cut diamonds, full British hallmarks for 18ct gold, size K

AN ANTIQUE SAPPHIRE AND DIAMOND CLUSTER RING in yellow gold and silver, set with an oval cut sapphire of approximately 1.29 carats in a cluster of old cut diamonds, no assay marks, size N1/2 / 7, 2.6g

A SAPPHIRE AND DIAMOND CLUSTER RING in 18ct yellow gold and platinum, set with an oval cut sapphire, in a halo of old mine cut diamonds, to stylised shoulders, stamped with maker's mark and 18CT & PLA

AN ANTIQUE BURMA NO HEAT PINK SAPPHIRE AND DIAMOND CLUSTER RING in yellow gold and silver, set with an oval cut pink sapphire of 1.36 carats in a cluster of old cut diamonds, on a bifurcated band, no

AN ANTIQUE SAPPHIRE AND DIAMOND CLUSTER RING, EARLY 20TH CENTURY in 18ct yellow gold and platinum, set with an oval cut sapphire within a halo of round cut diamonds, stamped 18ct Plat, size N / 6.5, 2

A SAPPHIRE AND DIAMOND CLUSTER RING in 18ct yellow gold and platinum, set with an oval cut blue sapphire of 1.36 carats within a border of round cut diamonds, with further diamonds set to the shoulder

NO RESERVE - A SAPPHIRE AND DIAMOND CLUSTER RING, EARLY 20TH CENTURY in 18ct yellow gold and platinum, set with an oval cut blue sapphire within a border of single cut diamonds, maker's mark SH&Co, st

A SAPPHIRE AND DIAMOND THREE STONE CLUSTER RING in 14ct yellow and white gold, set with three oval cut sapphires totalling 1.0-1.2 carats in a cluster of round brilliant cut diamonds, full British hal