CARTIER, A DIAMOND LOVE RING in 18ct rose gold, the band punctuated by screw head motifs, accented by a single round brilliant cut diamond, signed Cartier and numbered, stamped Au750, 4.0mm width, size L / 5.75, 4.6g. Current retail price: £2,270. 

Estimate £800 - £1,200

AN AQUAMARINE AND DIAMOND RING set with a cushion cut aquamarine of 27.50 carats, the stylised mount accented by round brilliant cut diamonds, inscribed 27.50 D0.60, stamped 18K, size W / 11, 31.4g. 

Estimate £2,500 - £3,500

A 7.21 CARAT DIAMOND ETERNITY RING set all around with a row of marquise cut diamonds all totalling 7.21 carats, inscribed VVS 7.21ct, stamped PT950, size O / 7.25, 10.5g. 

Estimate £7,000 - £9,000

A FINE COLOMBIAN EMERALD AND DIAMOND RING set with an octagonal step cut emerald of approximately 3.32 carats, accented by pave set round brilliant cut diamonds, the diamonds all totalling 1.6-2.0 carats, stamped 750, size N / 6.75, 11.7g. Accompanie

Estimate £8,000 - £12,000

A MORGANITE AND DIAMOND RING set with an octagonal step cut morganite of approximately 43.50 carats, the gallery accented by round brilliant cut diamonds, no assay marks, size O1/2 / 7.5, 20.5g. 

Estimate £3,500 - £5,500

AN ANTIQUE SOLITAIRE DIAMOND RING in 18ct yellow gold, set with an old European cut diamond of approximately 1.85 carats, full British hallmarks for Birmingham 1899, size U / 10, 5.3g. 

Estimate £4,000 - £6,000

STEPHEN WEBSTER, A MOTHER OF PEARL, ROCK CRYSTAL AND DIAMOND CRYSTAL HAZE RING in 18ct white gold, set with a slice of mother of pearl beneath a faceted rock crystal dome, accented by a border of round brilliant cut diamonds, SW maker's mark, full Br

Estimate £1,200 - £1,800

AN ORANGE SAPPHIRE AND DIAMOND RING set with a cushion cut orange sapphire of 7.11 carats, accented on each side by four round brilliant cut diamonds, no assay marks, size Q1/2 / 8.5, 9.3g. 

Estimate £1,800 - £2,500

A 21.20 CARAT BURMA NO HEAT SAPPHIRE AND DIAMOND RING set with an octagonal step cut sapphire 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 EMERALD AND DIAMOND THREE STONE RING set with a cushion cut emerald of 1.77 carats accented on each side by an emerald cut diamond, stamped 18K, size N1/2 / 7, 3.1g. 

Estimate £1,800 - £2,200

BOODLE & DUNTHORNE, A DIAMOND RING in 18ct white and yellow gold, set with a princess cut diamond of approximately 1.21 carats, accented on each side by a smaller princess cut diamond, signed Boodles, B&D maker's mark, full British hallmarks, size U

Estimate £2,500 - £3,500

HARRY WINSTON, A PAIR OF DIAMOND ETERNITY RINGS 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, stamped PT950, stamped 750, size M /

Estimate £10,000 - £15,000

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

POMELLATO, A MOONSTONE AND WHITE TOPAZ STARFISH RING designed as a starfish, set throughout with round cabochon moonstones and round cut white topaz, signed Pomellato, stamped 750, size M / 6.25, 31.7g. 

Estimate £2,000 - £3,000

DAVID WEBB, AN AMETHYST RING set with a cushion cut amethyst in a hammered gold mount, sizing band obscuring signature and marks, size L / 5.75, 17.9g. 

Estimate £4,000 - £6,000

TIFFANY & CO., A VINTAGE 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 DIAMOND BELCHER RING in 18ct yellow gold, set with an old cut diamond of approximately 0.70 carats, full British hallmarks for Birmingham 1905, size W / 11, 7.5g.  

Estimate £800 - £1,200

A SAPPHIRE AND DIAMOND THREE STONE RING set with an oval cut sapphire between two old cut diamonds, stamped 18CT PLAT, size J1/2 / 5, 2.6g. 

Estimate £800 - £1,200

AN AQUAMARINE AND DIAMOND RING set with an oval cut aquamarine between two single cut diamonds, stamped 18CT, size O / 7.25, 3.5g. 

Estimate £300 - £500

A STAR SAPPHIRE AND DIAMOND RING set with a round cabochon star sapphire of 6.16 carats in a border of round brilliant cut diamonds, stamped 18K, size M1/2 / 6.5, 5.7g. 

Estimate £1,000 - £1,500

A BLACK PEARL, TSAVORITE GARNET AND DIAMOND RING set with a black pearl of 18.0mm, the mount accented by round cut tsavorite garnets and round brilliant cut diamonds, no assay marks, size O / 7.25, 19.4g. 

Estimate £1,500 - £2,500

A HESSONITE GARNET AND DIAMOND RING set with a cushion cut hessonite garnet of 7.30 carats, accented on each side with trios of old cut diamonds, the diamonds all totalling 1.73 carats, inscribed 7.30 1.73, stamped 18K, size U / 10, 23.0g. 

Estimate £1,500 - £2,500

A PINK TOURMALINE AND DIAMOND RING set with a cushion cut pink tourmaline of 5.03 carats in a border of round cut diamonds, the shoulders set with further round cut diamonds, stamped 18K, size M / 6.25, 4.7g. 

Estimate £1,200 - £1,600

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

STEPHEN WEBSTER, A DIAMOND HALF ETERNITY RING in 18ct white gold, the stylised band pave set with two rows of round brilliant cut diamonds, SW maker's mark, full British hallmarks, size M1/2 / 6.5, 7.7g. 

Estimate £500 - £700

A BLUE TOPAZ AND DIAMOND RING set with an octagonal step cut blue topaz of approximately 15.98 carats, accented by pave set round brilliant cut diamonds, no assay marks, size P / 7.5, 20.9g. 

Estimate £1,200 - £1,800

A LILAC CHALCEDONY AND DIAMOND RING set with an oval cabochon lilac chalcedony in a border of round cut diamonds, the bifurcated band set with further round cut diamonds, the diamonds all totalling 1.14 carats, stamped 18K, size L1/2 / 6, 22.4g. 

Estimate £2,000 - £3,000

A SPHALERITE AND DIAMOND RING in 18ct yellow gold, set with a round cut sphalerite of approximately 23.90 carats in a border of pave set round brilliant cut diamonds, partial British hallmarks, size O1/2 / 7.5, 13.0g. 

Estimate £1,000 - £1,500

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

AN AMETHYST AND DIAMOND DRESS RING set with an octagonal step cut amethyst of 19.14 carats in a border of round cut diamonds, further round cut diamonds set to the bifurcated band, the diamonds all totalling 1.19 carats, stamped 14K, size N1/2 / 7, 9

Estimate £1,200 - £1,600

CARTIER, A LOVE RING in 18ct rose gold, the band punctuated by screw head motifs, signed Cartier and numbered, stamped Au750, 3.6mm width, size N / 6.75, 3.3g. Current retail price: £1,200. 

Estimate £400 - £600

VAN CLEEF & ARPELS, AN EMERALD AND DIAMOND RING in 18ct yellow gold, set with an oval cabochon emerald of 6.08 carats in a cluster of round brilliant and baguette cut diamonds, the shoulders pave set with further round brilliant cut diamonds, inscrib

Estimate £30,000 - £50,000

A RUBELLITE TOURMALINE AND DIAMOND CLUSTER RING set with an oval cut rubellite tourmaline of 1.23 carats in a cluster of round brilliant cut diamonds, stamped 18K, size M1/2 / 6.5, 4.4g. 

Estimate £1,000 - £1,500

AN AQUAMARINE, TSAVORITE GARNET AND SAPPHIRE DRESS RING set with an octagonal step cut aquamarine of approximately 12.55 carats, the stylised mount accented by tsavorite garnets and sapphires, stamped 750, size L / 5.75, 17.7g. 

Estimate £1,500 - £2,500

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

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

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

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

PIAGET, A DIAMOND POSSESSION RING set all around with four rows of round brilliant cut diamonds, one row articulated, the diamonds all totalling 4.0-4.2 carats, signed Piaget and numbered, stamped 750, size N1/2 / 7, 13.0g. 

Estimate £5,000 - £7,000

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

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

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 RUBY AND DIAMOND RING set with an oval cabochon ruby in a border of round brilliant cut diamonds, stamped 18K, size V1/2 / 10.75, 27.6g. 

Estimate £2,500 - £3,500

AN UNHEATED SAPPHIRE AND DIAMOND RING set with an octagonal step cut sapphrie of 4.12 carats, accented on each side by an emerald cut diamond of 0.30 carats, stamped PT950, size M1/2 / 6.5, 6.0g. Accompanied by a gemmological report stating that the

Estimate £4,000 - £6,000

A CORAL RING set with a large cabochon coral, the mount with engraved foliate details, stamped 750, size M / 6.25, 19.7g. 

Estimate £800 - £1,200

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 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 YELLOW SAPPHIRE AND DIAMOND RING set with an octagonal step cut yellow sapphire of 2.00 carats, accented on each side by an emerald cut diamond, inscribed S2.00ct, stamped PT950, size M1/2 / 6.5, 5.0g. 

Estimate £600 - £800

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

PIAGET, A DIAMOND FREEDOM RING set with three rows of baguette cut diamonds, accented by rows of round brilliant cut diamonds, signed Piaget and numbered, stamped 750, size N / 6.75, 27.3g. 

Estimate £2,500 - £3,500

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 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 TURQUOISE AND DIAMOND RING set with an oval cabochon turquoise in a border of round cut diamonds, the shoulders set with further round cut diamonds, stamped 18K, size M1/2 / 6.5, 5.6g. 

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

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 LAVENDER JADEITE JADE AND DIAMOND RING set with an oval cabochon jadeite jade in a border of round brilliant cut diamonds, no assay marks, size S / 9.25, 21.6g. 

Estimate £1,800 - £2,500

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

AN AMETHYST AND DIAMOND DRESS RING set with a round cut amethyst of 31.34 carats in a border of round cut diamonds, further round cut diamonds set to the shoulders, stamped 14K, size L1/2 / 6, 13.1g.

Estimate £1,500 - £2,500

A BURMA NO HEAT SAPPHIRE AND DIAMOND THREE STONE RING set with a cushion cut sapphire of 1.60 carats, accented on each side by an old cut diamond, the diamonds both totalling 1.20 carats, stamped 750, size N / 6.75, 6.1g. With a gemmological verbal a

Estimate £3,000 - £5,000

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 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 FIRE OPAL AND DIAMOND DRESS RING set with a pear cut fire opal of 3.24 carats accented by round cut diamonds, the diamonds all totalling 0.81 carats, on a bifurcated band, stamped 18K, size Q / 8.25, 6.8g. 

Estimate £1,500 - £2,500

A BLUE AND PINK SAPPHIRE GYPSY RING set with an oval cut blue sapphire accented on each side by a round cut pink sapphire, the sapphires all totalling 4.75 carats, stamped 18K, size Q / 8.25, 17.4g. 

Estimate £3,000 - £5,000

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 SAPPHIRE AND DIAMOND DRESS RING set with a round cut sapphire of approximately 1.89 carats, accented by sections of pave set round brilliant cut diamonds, stamped 18K, size O1/2 / 7.5, 11.4g. 

Estimate £1,500 - £2,500

AN EMERALD AND DIAMOND CLUSTER RING set with an octagonal step cut emerald of approximately 1.00 carat in a cluster of round brilliant cut diamonds, stamped 750, size N / 6.75, 4.6g. 

Estimate £800 - £1,200

A SAPPHIRE, EMERALD AND DIAMOND RING set with an octagonal step cut sapphire and emerald, accented by two marquise cut diamonds and round brilliant cut diamonds, the diamonds all totalling 1.8-2.0 carats, no assay marks, size M / 6.25, 6.6g. 

Estimate £2,000 - £3,000

A PINK TOURMALINE AND DIAMOND RING set with an oval cut pink tourmaline of 3.19 carats in a border of round cut diamonds, the shoulders set with further round cut diamonds, stamped 18K, size L1/2 / 6, 4.2g. 

Estimate £1,000 - £1,500

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

AN UNHEATED SAPPHIRE AND DIAMOND RING set with an octagonal step cut sapphire of 2.34 carats, accented by round brilliant and baguette cut diamonds, stamped 14K, size K1/2 / 5.5, 6.1g. Accompanied by a gemmological report card stating that the sapphi

Estimate £800 - £1,200

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

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 RUBY, SAPPHIRE AND DIAMOND DRESS RING set with an octagonal step cut sapphire and oval cut ruby accented by round brilliant cut diamonds, on a double bicolour band, stamped 750, size M / 6.25, 9.0g. 

Estimate £1,500 - £2,500

TIFFANY & CO., A DIAMOND STREAMERICA RING the band accented by round brilliant cut diamonds, signed Tiffany & Co., stamped 750, size N1/2 / 7, 5.7g. 

Estimate £800 - £1,200

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 LEMON QUARTZ AND DIAMOND RING set with an octagonal step cut lemon quartz, accented by round brilliant cut diamonds, stamped 750, size T / 9.5, 22.2g.  

Estimate £1,500 - £2,500

A COLOMBIAN EMERALD AND DIAMOND RING set with a pear cut emerald of approximately 8.50 carats in a border of round brilliant cut diamonds, stamped 750, size N / 6.75, 8.8g. Accompanied by a gemmological report stating the emerald is of Colombian orig

Estimate £3,000 - £5,000

AN ANTIQUE AMETHYST AND PASTE CLUSTER RING set with an oval cut amethyst in a cluster of old cut paste stones, no assay marks, size P / 7.75, 11.8g. 

Estimate £300 - £500

AN AUSTRIAN DIAMOND DRESS RING in 14ct white gold, set to the centre with a transitional cut diamond of approximately 0.50 carats, the pierced border accented by further diamonds, Austrian assay marks, stamped 585, size N / 6.75, 2.5g. 

Estimate £1,500 - £2,500

A YELLOW SAPPHIRE AND DIAMOND RING set with an oval cut yellow sapphire accented by round cut diamonds, stamped 14K, size M / 6.25, 1.7g. 

Estimate £150 - £250

A SAPPHIRE AND DIAMOND CLUSTER RING set with an oval cut sapphire of 1.97 carats in a cluster of round brilliant cut diamonds, stamped 750, size K / 5.25, 4.7g. 

Estimate £600 - £800

A 5.05 CARAT DIAMOND FULL ETERNITY RING set all around with a row of round brilliant cut diamonds, stamped PT950, inscribed 5.05ct, size T1/2 / 9.75, 15.7g. 

Estimate £2,000 - £3,000

AN EMERALD AND DIAMOND BALLERINA RING set with an oval cabochon emerald of 8.10 carats in a ballerina mount set with baguette and round brilliant cut diamonds all totalling 2.02 carats, inscribed 8.10 2.02, stamped 18K, size U1/2 / 10.25, 12.8g. 

Estimate £2,000 - £3,000

AN EMERALD AND DIAMOND CLUSTER RING set with an oval cut emerald of approximately 2.49 carats in a double cluster of round brilliant cut diamonds, accented by baguette cut diamonds, the diamonds all totalling 1.3-1.4 carats, stamped 750, size N / 6.7

Estimate £2,000 - £3,000

A DIAMOND BAND RING in 18ct white gold, the wide band pave set to one half with round brilliant cut diamonds all totalling 1.36 carats, inscribed 1.36, partial British hallmarks, size O1/2 / 7.5, 18.1g. 

Estimate £1,200 - £1,600

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

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

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