A 1.20 CARAT D COLOUR SOLITAIRE DIAMOND RING in platinum, set east west with an oval brilliant cut diamond of 1.20 carats, partial British hallmarks, size M / 6.25, 5.3g. Accompanied by a GIA report stating that the diamond is D colour and SI1 clarit

Estimate £2,500 - £3,500

THEO FENNELL, A 11.43 CARAT PARAIBA TOURMALINE AND DIAMOND RING in 18ct white gold, set with a cushion cut Paraiba tourmaline of 11.43 carats in a border of round brilliant cut diamonds, the gallery designed as a coiled dragon and accented by further

Estimate £30,000 - £50,000

A BLACK OPAL AND DIAMOND RING set with an oval cabochon black opal of approximately 19.26 carats, accented on each side by a trapezoid cut diamonds, the diamonds both totalling 2.4-2.6 carats, no assay marks, size M / 6.25, 14.1g. 

Estimate £25,000 - £35,000

CARTIER, A VINTAGE CHRYSOPRASE, ONYX, RUBY AND DIAMOND DRESS RING in 18ct yellow gold, set with a carved chrysoprase accented by polished onyx, step cut rubies and round cut diamonds, signed Cartier and numbered, stamped 750, size H1/2 / 4, 9.3g. 

Estimate £3,000 - £5,000

ALEXIS NY, A DIAMOND, SAPPHIRE AND ENAMEL SNAKE RING comprising a row of articulated links decorated with turquoise and white enamel, the head and tail set with round brilliant cut diamonds, the eyes set with marquise cut sapphires, inscribed D0.32 S

Estimate £1,500 - £2,500

A 3.19 CARAT SOLITAIRE DIAMOND RING in platinum, set with a round brilliant cut diamond of 3.19 carats, flanked by two tapered baguette cut diamonds, full British hallmarks, size M1/2 / 6.5, 5.5g. 

Estimate £20,000 - £30,000

A FINE D COLOUR DIAMOND AND COLOMBIAN EMERALD TOI ET MOI RING in platinum, set with an emerald cut diamond of 1.89 carats and an octagonal step cut emerald of approximately 1.42 carats, full British hallmarks, size L1/2 / 6, 6.1g. Accompanied by a fa

Estimate £15,000 - £25,000

AN ANTIQUE SAPPHIRE AND DIAMOND FIVE STONE RING in 18ct yellow gold, set with a row of alternating cushion cut sapphires and old cut diamonds, the principal sapphire weighing approximately 1.11 carats, the diamonds totalling 0.8-1.0 carat, stamped 18

Estimate £2,000 - £3,000

CARTIER, A WIDE LOVE RING in 18ct white gold, the wide band with a single screw motif, signed Cartier and numbered, Swiss assay marks, stamped 750, size K1/2 / 5.5, 16.0g. 

Estimate £1,500 - £2,500

BUCCELLATI, A GOLD FLOWER RING designed as a flower head, signed Buccellati, stamped 18KT 750, size K1/2 / 5.5, 9.3g. 

Estimate £1,200 - £1,600

A KUNZITE AND DIAMOND RING set with an oval cut kunzite of 8.28 carats, the claw setting and band pave set with round brilliant cut diamonds, stamped 18K, size N / 6.75, 6.4g. 

Estimate £1,200 - £1,600

A COLOMBIAN EMERALD AND DIAMOND CLUSTER RING set with an octagonal step cut emerald of 2.31 carats in a cluster of round brilliant cut diamonds, stamped 18K, size J / 4.75, 5.2g. Accompanied by a gemmological report stating the emerald is of Colombia

Estimate £3,000 - £5,000

JULIUS COHEN, AN AQUAMARINE AND DIAMOND DRESS RING set with an octagonal step cut aquamarine of approximately 27.15 carats accented by round brilliant cut diamonds, the shoulders designed as a merman and mermaid, signed Julius Cohen, stamped 18K, siz

Estimate £5,000 - £7,000

BULGARI, A FINE SAPPHIRE AND DIAMOND TROMBINO RING in 18ct white gold, set with a cushion cut sapphire of 2.79 carats, between rows of baguette cut diamonds, accented by pave set round brilliant cut diamonds, inscribed 2.79, signed Bvlgari, stamped

Estimate £15,000 - £20,000

AN UNHEATED RUBY AND DIAMOND RING set with a round cut ruby of 1.95 carats accented by round brilliant and baguette cut diamonds, the diamonds all totalling 1.15 carats, inscribed 1.958 1.15, stamped Pt900, size M / 6.25, 11.8g. With a gemmological v

Estimate £3,000 - £5,000

A FRENCH DIAMOND TOURBILLION RING set with a round brilliant cut diamond of approximately 0.60 carats in a crossover mount set with further round brilliant cut diamonds, French maker's mark, no assay marks, size P / 7.5, 5.3g.

Estimate £4,000 - £6,000

DAVID WEBB, AN ENAMEL DRESS RING decorated throughout with stripes of black and cream enamel, signed David Webb, stamped 18K, sizing band, size K1/2 / 5.5, 21.4g. 

Estimate £2,000 - £3,000

A GREEN TOURMALINE AND DIAMOND RING set with an octagonal step cut green tourmaline of 23.29 carats in a border of round brilliant cut diamonds, the trifurcated shoulders set with further diamonds, stamped 18K, size N / 6.75, 12.6g. 

Estimate £3,000 - £5,000

AN ANTIQUE SAPPHIRE AND DIAMOND RING in yellow gold, set with three cushion cut sapphires  accented by old cut diamonds, the sapphires all totalling 1.8-2.0 carats, no assay marks, size R1/2 / 9, 5.0g. 

Estimate £800 - £1,200

VAN CLEEF & ARPELS, A RUBY AND DIAMOND FLOWER RING in 18ct yellow gold, the bombe face set with round cut rubies and round brilliant cut diamonds, signed Van Cleef & Arpels and numbered, stamped 18KT, size K / 5.25, 5.4g. 

Estimate £4,500 - £5,500

A NATURAL FANCY DEEP BROWNISH YELLOW AND WHITE DIAMOND RING set with a cut cornered rectangular modified brilliant cut fancy deep brownish yellow colour diamond in a border of round brilliant cut diamonds, the gallery accented by round brilliant cut

Estimate £7,000 - £9,000

A CEYLON NO HEAT SAPPHIRE AND DIAMOND DRESS RING set with a cushion cut sapphire of 6.88 carats in a concentric border of round brilliant cut yellow and white diamonds, the shoulders set with pear cut yellow diamonds and round brilliant cut white dia

Estimate £20,000 - £30,000

A BLUE AND FANCY ORANGY PINK DIAMOND RING set with a round brilliant cut blue diamond of approximately 1.16 carats between two pear cut fancy orangy pink diamonds of 0.34 and 0.27 carats, the band set with a row of round brilliant cut white diamonds,

Estimate £7,000 - £9,000

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

Estimate £800 - £1,200

AN EMERALD AND DIAMOND CLUSTER RING set with an octagonal step cut emerald of 2.35 carats in a cluster of round brilliant cut diamonds, the shoulders set with further round brilliant and baguette cut diamonds, the diamonds all totalling 1.45 carats,

Estimate £2,000 - £3,000

POMELLATO, A RHODOLITE GARNET STARFISH RING designed as a starfish set throughout with round cabochon and round cut rhodolite garnets, signed Pomellato and numbered, stamped 750, size M / 6.25, 32.1g. 

Estimate £2,000 - £3,000

AN ANTIQUE PEARL AND ENAMEL MOURNING RING the oval face set with a pearl in a star motif, relieved in black enamel, the band set with hairwork, inscribed 'J.M. Wright died 15th Augt 1864', no assay marks, size K1/2 / 5.5, 2.5g. 

Estimate £800 - £1,200

A NATURAL FANCY ORANGY YELLOW AND WHITE DIAMOND RING set with a round brilliant cut diamond of 1.18 carats in a border or round brilliant cut diamonds, the gallery accented by round brilliant cut white and yellow diamonds, stamped 14K, size M / 6.25,

Estimate £3,000 - £5,000

VAN CLEEF & ARPELS, A DIAMOND RING in 18ct white gold, pave set with three rows of round brilliant cut diamonds, the diamonds all totalling 1.0-1.2 carats, signed VCA and numbered, French assay marks, stamped 750, size J1/2 / 5, 5.6g.

Estimate £3,000 - £5,000

AN ART DECO KASHMIR SAPPHIRE AND DIAMOND RING in platinum, set with a sugarloaf cabochon sapphire of 4.43 carats, the ornate mount with Greek Key motifs and accented by single cut diamonds, marked indistinctly, size I / 4.25, 6.2g. Accompanied by a f

Estimate £40,000 - £60,000

BUCCELLATI, A DIAMOND DRESS RING the round openwork face set with a round brilliant cut diamond, in a concentric border of further diamonds, signed Buccellati, stamped 750, size O / 7.25, 9.2g. 

Estimate £4,000 - £6,000

AN EMERALD AND DIAMOND CLUSTER RING set with a round cabochon emerald of approximately 5.35 carats in a cluster of round brilliant cut diamonds, no assay marks, size J / 4.75, 5.8g. 

Estimate £1,200 - £1,600

A FANCY INTENSE GREENISH YELLOW DIAMOND CROSSOVER RING set with a modified shield mixed cut fancy intense greenish yellow diamond of 0.62 carats and a trillion cut diamond, the band set with princess and step cut diamonds, stamped 14K, size M1/2 / 6.

Estimate £4,000 - £6,000

A BLACK OPAL AND DIAMOND CLUSTER RING set with an oval cabochon black opal of approximately 3.92 carats in a cluster of round brilliant cut diamonds, the diamonds all totalling 1.26 carats, inscribed 3.92 1.26, stamped Pt900, size M1/2 / 6.5, 14.5g. 

Estimate £12,000 - £16,000

A DIAMOND DRESS RING set with a hexagonal step cut diamond of approximately 1.75 carats, the shoulders set with baguette cut diamonds, stamped 750 18Kt, size M / 6.25, 5.7g. 

Estimate £3,500 - £4,500

A SAPPHIRE AND DIAMOND DRESS RING set with an oval cut sapphire of approximately 4.00 carats, in a cluster of round brilliant and tapered baguette cut diamonds, inscribed D0.88, stamped Pt900, size K1/2 / 5.5, 10.4g. 

Estimate £3,000 - £5,000

BOUCHERON, A MULTIGEM PEACOCK RING designed as a peacock set with round brilliant cut diamonds and pink and yellow round cut sapphires, the feathers set with pear shaped cabochon pink and yellow sapphires and rubies, a cushion cut ruby, and further r

Estimate £25,000 - £30,000

A FRENCH ART DECO DIAMOD BOMBE RING in platinum, set with a transitional cut diamond of approximately 0.86 carats, the pierced bombe mount accented with single cut diamonds, French assay marks, size S / 9, 5.9g. 

Estimate £4,000 - £6,000

A 3.85 CARAT CEYLON NO HEAT PADPARADSCHA SAPPHIRE AND DIAMOND CLUSTER RING set with a cushion cut sapphire of 3.85 carats, in a cluster of round brilliant cut diamonds, the diamonds all totalling 1.1-1.2 carats, stamped 585, size T1/2 / 10, 6.2g. Acc

Estimate £15,000 - £25,000

BUCCELLATI, AN EMERALD AND DIAMOND RING set with an oval cabochon emerald accented on each side by a round brilliant cut diamond, inscribed J.A.S. 2-72, signed Buccellati, stamped 750, size J / 4.75, 9.4g. 

Estimate £2,000 - £3,000

A BLUE AND PINK DIAMOND RING set with a heart cut blue diamond of approximately 0.97 carats between two pear cut pink diamonds, the band set with a row of round brilliant cut white diamonds, stamped PT950, size M / 6.25, 4.0g. 

Estimate £7,000 - £9,000

A 21.20 CARAT BURMA NO HEAT SAPPHIRE AND DIAMOND RING set with an octagonal step cut sapphrie of 21.20 carats in a cluster of round brilliant cut diamonds, the diamonds all totalling 2.4-2.6 carats, marked indistinctly, size K / 5.25, 11.6g. Accompan

Estimate £20,000 - £30,000

AN UNHEATED RUBY AND DIAMOND RING set with a pear cut ruby of 3.01 carats accented by round brilliant cut diamonds, the diamonds all totalling 1.17 carats, inscribed R.3.01 D1.17, size M / 6.25, 12.6g. Accompanied by a facsimile gemmological report s

Estimate £10,000 - £15,000

VAN CLEEF & ARPELS, A DIAMOND LOTUS BETWEEN THE FINGER RING the articulated double ring comprising a lotus flower and two leaves pave set throughout with round brilliant cut diamonds, the diamonds all totalling 2.1-2.2 carats, signed VCA and numbered

Estimate £8,000 - £12,000

A RUBELLITE TOURMALINE AND DIAMOND RING set with a cushion cut rubellite tourmaline of 18.70 carats, the gallery and shoulders pave set with round brilliant cut diamonds all totalling 2.20 carats, stamped 18K, size O / 7.25, 11.2g. 

Estimate £8,000 - £12,000

A 3.98 CARAT CEYLON NO HEAT PADPARADSCHA SAPPHIRE AND DIAMOND CLUSTER RING set with a cushion cut sapphire of 3.98 carats, in a cluster of round brilliant cut diamonds, no assay marks, size I / 4.25, 5.2g. Accompanied by a facsimile gemmological repo

Estimate £10,000 - £15,000

A TREATED YELLOW AND WHITE DIAMOND THREE STONE RING set with a radiant cut treated yellow diamond of approximately 2.00 carats between two trillion cut diamonds, the diamonds all totalling 2.42 carats, stamped PLAT, size N / 6.75, 7.9g. 

Estimate £8,000 - £12,000

A COLOMBIAN EMERALD AND DIAMOND CLUSTER RING set with a cushion cut emerald of approximately 6.25 carats in a double cluster of round brilliant cut diamonds, the diamonds all totalling 2.4-2.6 carats, stamped 750, size N1/2 / 7, 10.5g. Accompanied by

Estimate £10,000 - £15,000

A RUBELLITE TOURMALINE AND DIAMOND RING set with an oval cut rubellite tourmaline in a border of round brilliant cut diamonds, no assay marks, size N1/2 / 7, 18.8g. 

Estimate £2,000 - £3,000

A MULTIGEM PANTHER RING designed as a coiled panther, set with square step cut rubies, emeralds and sapphires, round cut emeralds and an oval cut sapphire, accented by round brilliant cut diamonds, inscribed 1.25 S0.51 D0.77, stamped K18, size L / 5.

Estimate £2,000 - £3,000

CHIMENTO, A ROSE QUARTZ AND DIAMOND DRESS RING set with a fancy cut rose quartz accented by round brilliant cut diamonds, signed Chimento and numbered, stamped 750, size N / 6.75, 17.0g. 

Estimate £800 - £1,200

DAVID WEBB, A DIAMOND RING the band ring accented by geometric segments set with round brilliant cut diamonds, signed Webb, stamped PLAT 18K, size I1/2 / 4.5, 13.0g. 

Estimate £5,000 - £7,000

A TOPAZ AND DIAMOND RING set with an oval cut topaz of 15.52 carats in a border of pave set round brilliant cut diamonds, the bifurcated shoulders pave set with further diamonds, the diamonds all totalling 1.84 carats, stamped 18K, size N / 6.75, 12.

Estimate £6,000 - £8,000

A YELLOW SAPPHIRE AND DIAMOND RING set with an octagonal mixed cut yellow sapphire of approximately 7.85 carats, the gallery and shoulders set with round cut diamonds, no assay marks, size N / 6.75, 6.5g. 

Estimate £4,000 - £6,000

BOUCHERON, AN EMERALD RING in 18ct yellow gold, the fluted band set with a cabochon emerald, signed Boucheron Paris, French assay marks, size J / 4.75, 16.0g. 

Estimate £2,000 - £3,000

A RUBY AND DIAMOND BOMBE RING in 18ct yellow gold, the bombe face set with round cut rubies accented by round brilliant cut diamonds, the rubies all totalling 3.4-3.6 carats, stamped 750, British import marks, size K1/2 / 5.5, 6.8g. 

Estimate £2,000 - £3,000

A BLACK OPAL AND DIAMOND RING set with a cabochon black opal of approximately 19.89 carats in a stylised mount accented by round brilliant cut diamonds, no assay marks, size J / 4.75, 11.3g. 

Estimate £1,000 - £1,500

A SPINEL RING set with an oval cut spinel of approximately 3.02 carats, no assay marks, size M / 6.25, 4.5g. 

Estimate £2,500 - £3,500

A 4.23 CARAT DIAMOND RING set with a round brilliant cut diamond of 4.23 carats in a border of round brilliant cut diamonds, the bifurcated band set with further diamonds, mount signed GRAFF, no assay marks, size M1/2 / 6.5, 8.1g. Accompanied by a fa

Estimate £80,000 - £120,000

TIFFANY & CO., A DIAMOND RING pave set with rows of round brilliant cut diamonds, signed Tiffany & Co., stamped IRID.PLAT. 18K, size M1/2 / 6.5, 10.0g. 

Estimate £4,000 - £6,000

A PEARL AND DIAMOND RING set with a pearl of 9.8mm set with a rose cut diamond, the shoulders set with further rose cut diamonds, no assay marks, size P / 7.75, 3.9g. 

Estimate £2,500 - £3,500

A BURMA NO HEAT RUBY AND DIAMOND THREE STONE RING set with an oval cut ruby of 1.06 carats accented on each side by a pear cut diamond, stamped PT950, size K1/2 / 5.5, 6.4g. Accompanied by a gemmological report stating the ruby is of Burmese (Myanmar

Estimate £3,000 - £5,000

CHANEL, AN EMERALD AND DIAMOND RING in 18ct white gold, set with an oval cabochon emerald accented by princess cut diamonds, the diamonds all totalling approximately 1.00 carat, signed Chanel and numbered, French assay marks, stamped 750, size K / 5.

Estimate £3,500 - £4,500

VAN CLEEF & ARPELS, A LAPIS LAZULI AND DIAMOND RING set with two sections of fluted lapis lazuli, accented by three round brilliant cut diamonds, signed VCA and numbered, stamped 18KT, size J1/2 / 5, 4.3g. 

Estimate £2,000 - £3,000

VAN CLEEF & ARPELS, A DIAMOND AND MULTIGEM RING in 18ct yellow gold, comprising a row of alternating round cut sapphires, rubies and emeralds, accented by two rows of round brilliant cut diamonds, signed VCA and numbered, French assay marks, size K1/

Estimate £4,500 - £5,500

POMELLATO, A ROCK CRYSTAL AND DIAMOND DRESS RING set with a fancy cut rock crystal of approximately 22.46 carats accented by round brilliant cut diamonds, the diamonds all totalling 2.0-2.2 carats, signed Pomellato, stamped 750, size M1/2 / 6.5, 27.1

Estimate £4,000 - £6,000

A GARNET AND DIAMOND THREE STONE RING set with a cushion cut garnet of 2.35 carats accented on each side by a baguette cut diamond, inscribed 2.35, stamped Pt900, size J1/2 / 5, 6.0g. 

Estimate £600 - £800

AN EMERALD AND DIAMOND RING set with an octagonal step cut emerald of 23.45 carats in a border of round brilliant cut diamonds, the shoulders set with further diamonds, inscribed D1.06ct 23.45ct, stamped 18K, size N / 6.75, 15.4g. 

Estimate £10,000 - £15,000

BULGARI, A CEYLON NO HEAT SAPPHIRE AND DIAMOND RING set with an oval cut sapphire of approximately 10.68 carats, accented by marquise cut diamonds, signed Bulgari, stamped 750, size K1/2 / 5.5, 14.8g. Accompanied by facsimile gemmological report stat

Estimate £15,000 - £20,000