A BLACK OPAL AND DIAMOND CLUSTER RING set with an oval cabochon black opal of approximately 7.23 carats in a double cluster of round brilliant cut diamonds, the diamonds all totalling 7.4-7.8 carats, stamped 750, size L1/2 / 6, 17.3g. 

Estimate £6,000 - £8,000

A CEYLON NO HEAT SAPPHIRE AND DIAMOND THREE STONE RING set with a cushion cut sapphire of 5.18 carats between two round brilliant cut diamonds, the diamonds both totalling 0.8-0.9 carats, stamped PLAT, size M / 6.25, 6.2g. Accompanied by a facsimile

Estimate £10,000 - £15,000

CARTIER, A DIAMOND PILLAR RING in 18ct yellow gold, the open band designed as a series of pillars set with round brilliant cut diamonds, the diamonds all totalling 3.5-3.8 carats, signed Cartier and numbered, French assay marks, size M / 6.25, 12.1g.

Estimate £6,000 - £8,000

TIFFANY & CO., A STAR SAPPHIRE RING set with an oval cabochon star sapphire of approximately 6.50 carats, signed Tiffany & Co., stamped 14K, size P1/2 / 8, 13.7g. 

Estimate £2,500 - £3,500

A GREEN TOURMALINE AND DIAMOND COCKTAIL RING set with an octagonal step cut green tourmaline of approximately 56.86 carats in a border of round brilliant cut diamonds, the shoulders set with further diamonds, the diamonds all totalling 2.5-3.0 carats

Estimate £10,000 - £15,000

ALEXIS NY, A DIAMOND, EMERALD AND ENAMEL SNAKE RING comprising a row of articulated links decorated with turquoise enamel, the head and tail set with round brilliant cut diamonds, the eyes set with marquise cut emeralds, inscribed D0.32 EM0.20, signe

Estimate £800 - £1,200

A 4.02 CARAT DIAMOND RING in platinum, set with a round brilliant cut diamond of 4.02 carats in a border of round brilliant and princess cut diamonds, further round brilliant cut diamonds accenting the shoulders, full British hallmarks, size L1/2 / 6

Estimate £15,000 - £20,000

CARTIER, A DIAMOND DRESS RING, 1993 comprising two domed bands pave set with round brilliant cut diamonds, the diamonds all totalling 2.5-2.8 carats, signed Cartier and numbered, stamped 750, size L1/2 / 6, 9.6g. 

Estimate £6,000 - £8,000

TIFFANY & CO., A LAPIS LAZULI RING in 18ct yellow gold, comprising a square piece of lapis lazuli, the corners encased by gold, signed Tiffany France, stamped 18KT, size J1/2 / 5, 11.5g.

Estimate £3,000 - £5,000

AN ANTIQUE INDIAN EMERALD, PEARL, DIAMOND AND ENAMEL RING in high carat yellow gold, set with a Mughal carved emerald of approximately 4.92 carats in a border of old cut diamonds and pearls, accented  by red and green enamel foliate motifs, no assay

Estimate £1,200 - £1,600

AN ANTIQUE DIAMOND AND SAPPHIRE THREE STONE RING in 18ct yellow gold, set with an old European cut diamond of approximately 1.30 carats accented on each side by a round cut sapphire, stamped 18CT, size M1/2 / 6.5, 4.7g. 

Estimate £3,000 - £5,000

A TOPAZ AND DIAMOND RING set with an octagonal step cut imperial topaz of approximately 4.70 carats, the stepped shoulders set with round cut diamonds, no assay marks, size N1/2 / 7, 5.5g. 

Estimate £1,500 - £2,500

LOT WITHDRAWN.

Estimate £3,000 - £5,000

A 3.77 CARAT SOLITAIRE DIAMOND RING set with a round brilliant cut diamond of 3.77 carats, the shoulders set with old cut diamonds, no assay marks, size P / 7.75, 4.7g. Accompanied by a GIA report stating the diamond is K colour and VS2 clarity. 

Estimate £15,000 - £20,000

A RETRO EMERALD AND DIAMOND DRESS RING set with a sugarloaf cabochon emerald accented by single cut diamonds, no assay marks, size M1/2 / 6.5, 10.1g. 

Estimate £1,500 - £2,500

AN EMERALD AND DIAMOND RING set with an octagonal step cut emerald of approximately 2.74 carats in a border of single cut diamonds, round cut diamonds set to the shoulders, inscribed E2.74 0.44, stamped PLAT, size M1/2 / 6.5, 7.4g. 

Estimate £3,500 - £4,500

A PINK TOURMALINE AND DIAMOND DRESS RING in 18ct white gold, set with a rectangular step cut pink tourmaline of 17.98 carats in a border of round brilliant cut diamonds, the trifurcated band set with further diamonds, stamped 18K, size M / 6.25, 11.7

Estimate £6,000 - £8,000

A SOLITAIRE DIAMOND RING the wide band set with a round brilliant cut diamond of approximately 3.00 carats, stamped 750, size L / 5.75, 29.5g. 

Estimate £12,000 - £16,000

AN EMERALD AND DIAMOND GYPSY RING set with an oval cabochon emerald of approximately 1.89 carats accented on each side by a pear cut diamond, the diamonds both totalling 0.6-0.7 carats, stamped 18K, size N / 6.75, 6.7g. 

Estimate £1,800 - £2,200

CARTIER, A DIAMOND DRESS RING in 18ct yellow gold, pave set with round brilliant cut diamonds, the diamonds all totalling 2.0-2.3 carats, signed Cartier and numbered, French assay marks, size M / 6.25, 11.9g. 

Estimate £4,000 - £6,000

A 6.75 CARAT BURMA NO HEAT RUBY AND DIAMOND RING set with an oval cut ruby of 6.75 carats in a border of single cut diamonds, stamped 750, size L1/2 / 6, 4.5g. Accompanied by a facsimile Gubelin report stating that the ruby is of Burmese (Myanmar) or

Estimate £70,000 - £90,000

AN ANTIQUE THREE STONE DIAMOND RING in yellow gold and silver, set with three old cut diamonds, the diamonds all totalling 1.7-1.9 carats, no assay marks, size L1/2 / 6, 3.3g. 

Estimate £3,000 - £5,000

A 3.01 CARAT SOLITAIRE DIAMOND RING set with a round brilliant cut diamond of 3.01 carats, the shoulders set with further round brilliant cut diamonds, stamped 750, size N1/2 / 7, 4.6g. Accompanied by a GIA report stating that the diamond is L colour

Estimate £10,000 - £15,000

AN ANTIQUE DIAMOND AND ENAMEL RING in yellow gold and silver, the diamond shaped face set with rose cut diamonds, accented by a rows of blue guilloche enamel in a lattice design, the diamonds all totalling 1.2-1.5 carats, no assay marks, size L1/2 /

Estimate £1,500 - £2,500

AN ANTIQUE SAPPHIRE AND DIAMOND CLUSTER RING in yellow gold and silver, set with an oval cut sapphire of approximately 5.70 carats in a cluster of old cut diamonds, the diamonds all totalling 1.0-1.2 carats, no assay marks, size P / 7.75, 10.5g. 

Estimate £4,000 - £6,000

DAVID WEBB, A CARNELIAN AND DIAMOND RING set with a hexagonal cabochon carnelian accented on each side by pairs of round brilliant cut diamonds, signed Webb, stamped 18K, size I / 4.25, 14.1g. 

Estimate £6,000 - £8,000

DAVID WEBB, A TURQUOISE, ONYX AND DIAMOND RING set with a pyramid cabochon turquoise accented by sections pave set with round brilliant cut diamonds, the band set with polished onyx, signed Webb, stamped 18K 900PT, size L1/2 / 6, 20.9g. 

Estimate £8,000 - £12,000

A PURPLE STAR SAPPHIRE RING set with an oval cabochon purple star sapphire of approximately 15.54 carats, no assay marks, size L1/2 / 6, 12.6g. 

Estimate £4,500 - £5,500

AN ART DECO EMERALD AND DIAMOND RING in platinum, set with a row of graduating square and rectangular step cut emeralds, accented by a border of single cut diamonds, stamped PLAT, size K1/2 / 5.5, 5.0g. 

Estimate £6,000 - £8,000

A DIAMOND DRESS RING set with three rows of variously cut diamonds, the bifurcated shoulders set with further round brilliant cut diamonds, the principal diamonds all totalling 5.54 carats, stamped 750, size M1/2 / 6.5, 7.2g. 

Estimate £5,000 - £7,000

HARRY WINSTON, A PAIR OF DIAMOND ETERNITY RINGS in 18ct yellow gold and platinum, each in identical design, channel set all around with trillion and inverted trillion cut diamonds, with the diamonds all totalling 8.0-10.0 carats, HW maker's mark, sta

Estimate £10,000 - £15,000

A DIAMOND RING set with an old European cut diamond of 6.08 carats in a border of baguette cut diamonds, marked indistinctly, size L1/2 / 6, 9.7g. 

Estimate £30,000 - £50,000

AN EMERALD AND DIAMOND DRESS RING set with an octagonal step cut emerald of approximately 15.78 carats, the stepped shoulders set with princess cut diamonds, stamped 750, size N / 6.75, 11.3g. 

Estimate £4,000 - £6,000

AN EMERALD AND DIAMOND BOMBE RING set with a cabochon emerald of 49.00 carats accented throughout with rose cut diamonds, the diamonds all totalling 4.70 carats, Italian assay marks, stamped 750, size Q / 8.25, 39.5g.

Estimate £12,000 - £16,000

DAVID WEBB, A CORAL AND DIAMOND BOMBE RING the bombe face set with an oval cabochon coral accented by round brilliant cut diamonds, signed David Webb, stamped 18K, size J1/2 / 5, 19.5g. 

Estimate £12,000 - £16,000

OSCAR HEYMAN & BROTHERS, A RUBY, SAPPHIRE AND DIAMOND CROSSOVER RING set with clusters of calibre cut rubies and sapphires, accented by round brilliant cut diamonds, Oscar Heyman & Brothers maker's mark and numbered, stamped 18K, size M / 6.25, 11.0g

Estimate £6,000 - £8,000

VAN CLEEF & ARPELS, A DIAMOND FULL ETERNITY RING set all around with princess cut diamonds all totalling 1.4-1.5 carats, signed VCA and numbered, stamped PT950, size L / 5.75, 3.8g. 

Estimate £3,000 - £5,000

A RUBY AND DIAMOND DRESS RING set with an oval cut ruby of approximately 3.00 carats, the band pave set with round cut diamonds and round cut rubies, no assay marks, size L / 5.75, 7.8g. 

Estimate £4,500 - £5,500

A DIAMOND ENGAGEMENT RING set with an emerald cut diamond of 2.08 carats, the shoulders set with a graduating row of baguette cut diamonds accented by round cut diamonds, no assay marks, size N / 6.75, 5.9g. 

Estimate £4,000 - £6,000

A 2.02 CARAT FANCY YELLOW DIAMOND RING set with a pear cut yellow diamond of 2.02 carats accented on each side by a tapered baguette cut diamond, stamped PT950, size M / 6.25, 5.6g. Accompanied by a facsimile GIA report stating the diamond is a natur

Estimate £15,000 - £20,000

SALAVETTI, A SPINEL AND DIAMOND THREE STONE RING set with an oval cut spinel of approximately 2.96 carats accented on each side by a trillion cut diamond, inscribed 296 032, signed Salavetti, stamped 750, size N1/2 / 7, 6.3g. 

Estimate £1,500 - £2,500

A DIAMOND DRESS RING set with round brilliant cut white, yellow, orange, green, pink and blue irradiated diamonds, stamped 18K, size J1/2 / 5, 7.0g. 

Estimate £2,000 - £3,000

A SOLITAIRE DIAMOND RING set with an emerald cut diamond of 0.90 carats, stamped 750, size N / 6.75, 3.3g.

Estimate £2,500 - £3,500

A STAR RUBY AND DIAMOND RING set with an oval cabochon star ruby of approximately 16.39 carats in a cluster of round brilliant and baguette cut diamonds, inscribed 16.39, stamped Pt900, size N1/2 / 7, 14.5g.

Estimate £2,500 - £3,500

A DIAMOND ENGAGEMENT RING set with a cushion cut diamond of 2.50 carats in a border of round cut diamonds, further round cut diamonds set to the shoulders, stamped 750, size M1/2 / 6.5, 4.6g. Accompanied by a gemmological report stating the diamond i

Estimate £6,000 - £8,000

CODOGNATO, AN AQUAMARINE AND ENAMEL RING set with an octagonal step cut aquamarine of approximately 6.70 carats in a border or periwinkle and black enamel, the shoulders designed as skulls and accented by further enamel, no assay marks, size O / 7.25

Estimate £4,500 - £5,500

A COLOMBIAN EMERALD AND DIAMOND RING set with a cushion cut emerald of approximately 2.60 carats, accented on each side by a round brilliant cut diamond, stamped 750, size R / 8.5, 10.6g. Accompanied by a facsimile gemmological report stating that th

Estimate £4,000 - £6,000

AN EMERALD GYPSY RING set with an oval cut emerald of approximately 6.30 carats, stamped 750, size N1/2 / 7, 11.5g.

Estimate £5,000 - £7,000

A SAPPHIRE AND DIAMOND RING set with a cushion cut sapphire of approximately 3.25 carats accented by round brilliant and single cut diamonds, no assay marks, size K / 5.25, 7.5g. 

Estimate £1,000 - £1,500

A STAR RUBY AND DIAMOND THREE STONE RING set with a round cabochon star ruby accented on each side by a fancy shield cut diamond, stamped PLAT, size O1/2 / 7.5, 7.7g. 

Estimate £1,500 - £2,500