A SAPPHIRE AND DIAMOND RING set with a round cut sapphire in a double border of single cut diamonds,

A SAPPHIRE AND DIAMOND RING in 18ct yellow gold, set with a round cut sapphire of 0.42 carats in a border of single cut diamonds, stamped 18CT, size O / 7, 2.0g.

A MOONSTONE, SAPPHIRE AND DIAMOND RING in 18ct white gold, set with a cabochon moonstone totalling 6.90 carats in a double border of round brilliant cut diamonds and round cut sapphires, stamped Au750

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 RING in 18ct yellow gold, set with a cabochon sapphire in a border of round and single cut diamonds, British hallmarks, size R / 8.5, 5.4g.

A SAPPHIRE AND DIAMOND RING in 18ct white gold, set with an oval cut sapphire of 3.13 carats in a double border of round brilliant cut diamonds, the diamonds all totalling 1.0-1.1 carats, stamped 18K,

AN ANTIQUE SAPPHIRE AND DIAMOND DRESS RING in 18ct yellow gold, set with an oval cut sapphire of approximately 1.70 carats in a border of round brilliant, old and single cut diamonds, the stepped shou

AN ANTIQUE SAPPHIRE AND DIAMOND RING in 18ct gold, set with a round cut sapphire in a border of old cut diamonds, accented by two further round cut sapphires, indistinct British hallmarks, size M / 6.

A CEYLON NO HEAT SAPPHIRE AND DIAMOND RING set with a cushion cut blue sapphire of 6.12 carats, within a border of single cut diamonds, no assay marks, size N / 6.75, 5.4g. Accompanied by a gemmologic

A SAPPHIRE, DIAMOND AND RUBY DRESS RING in 18ct white gold, set with a round cut sapphire, a single and old cut diamond and an oval cut ruby, stamped 18ct, size R / 8.5, 4.2g.

A VINTAGE SAPPHIRE AND DIAMOND RING in white gold, the domed face set with concentric rings of round cut blue sapphires and single cut diamonds, no assay marks, size P / 7.5, 11.9g.

AN OPAL, DIAMOND AND SAPPHIRE CLUSTER RING in yellow gold, set with a round cut sapphire in a border of round cut diamonds and cabochon opals, marked indistinctly, tests as yellow gold, size M / 6, 4.

A SAPPHIRE AND DIAMOND RING in 18ct yellow gold and silver, set with three oval cut sapphires in an open border set with single cut diamonds, stamped 750, size P / 7.75, 6.8g.

A SAPPHIRE AND DIAMOND CLUSTER RING in platinum, set with a round cut sapphire of 2.66 carats, surrounded by a border of round brilliant cut diamonds, stamped PT 950, size N1/2 / 6.75, 5.1g.

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 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'

A SAPPHIRE AND DIAMOND DRESS RING in 18ct yellow gold, set with a trio of cushion and round cut blue sapphires within borders of old cut diamonds, stamped 18ct, size L / 5.75, 3.7g.

A SAPPHIRE AND DIAMOND DRESS RING set with an oval cut sapphire of 0.55 carats in a stylised cross shaped border of french cut sapphires and single cut diamonds, no assay marks, size N / 6.75, 4.2g.

A SAPPHIRE AND DIAMOND SNAKE RING in yellow gold, designed as a snake coiled around itself, the head set with single cut diamonds the eyes set with round cut sapphires, no assay marks, size V / 10.5,

PINK SAPPHIRE AND DIAMOND DRESS RING in 18ct yellow gold, set with a round cut pink sapphire of 0.97 carats, within a border of round cut diamonds, with further diamonds set to the shoulders, stamped

YELLOW SAPPHIRE AND DIAMOND RING set with five oval cut yellow sapphires in a border of round cut diamonds, stamped 375, size M / 6, 2.3g.

A COLOUR CHANGE SAPPHIRE AND DIAMOND CLUSTER RING in 18ct white gold, set with a central cushion cut sapphire of 5.13 carats, encircled by a border of single cut diamonds, later British import marks,

NO RESERVE - AN ANTIQUE EDWARDIAN SAPPHIRE AND DIAMOND RING, 1909 in 18ct yellow gold, set with a trio of round cut blue sapphires, the central sapphire within a border of rose cut diamonds, full Brit

A SAPPHIRE AND DIAMOND CLUSTER RING an oval-cut sapphire within a double border of eight-cut diamonds, to diamond-set shoulders. Estimated total diamond weight 0.60ct, marked 'PT950', ring size L1/2,

set with 7 round-cut pink sapphires weighing approximately 0.75ct.; with 228 single-cut diamonds weighing approximately 1.00ct; length: 1 /14in.; size: 7