AN AQUAMARINE DRESS RING in fluted design, set with a pear cut aquamarine of approximately 3.44 carats, stamped 18K, size K1/2 / 5.5, 13.1g. 

Estimate £1,500 - £2,500

KAT FLORENCE, AN IMPORTANT UNHEATED PIGEON'S BLOOD RUBY AND DIAMOND RING set with a cushion cut ruby of 1.43 carats within a stylised border of round brilliant and marquise cut diamonds, the shoulders and gallery set with further diamonds, the diamon

Estimate £8,000 - £12,000

DAVID WEBB, A JADEITE JADE AND DIAMOND DRESS RING set with polished jadeite jade beads accented by round brilliant cut diamonds, accented by rows of rope work, signed Webb, stamped 18K, size adjustable from size L / 5.75 to M1/2 / 6.5, 22.5g. 

Estimate £5,000 - £7,000

VAN CLEEF & ARPELS, A DIAMOND PHILIPPINE RING in 18ct yellow and white gold, pave set with a section of single cut diamonds, signed VCA and numbered, French assay marks, stamped 750, size J1/2 / 5, 8.5g. 

Estimate £3,000 - £5,000

STERLE, A VINTAGE DIAMOND RING in yellow gold, in ropework design, accented by round brilliant cut diamonds, signed Sterle Paris and numbered, no assay marks, size I1/2 / 4.5, 11.4g. 

Estimate £3,000 - £5,000

BULGARI, A SAPPHIRE AND DIAMOND SERPENTI RING in 18ct white gold, designed as a coiled snake set with round brilliant cut diamonds, the eyes set with pear cut sapphires, signed Bulgari and numbered, stamped Au750, size N / 6.75, 8.4g. 

Estimate £5,000 - £7,000

A BURMA NO HEAT RUBY AND DIAMOND RING in white gold, set with a cushion cut ruby of approximately 3.60 carats accented by round brilliant cut diamonds, the diamonds all totalling 3.0-3.2 carats, marked indistinctly, size G1/2 / 3.5, 10.2g. Accompanie

Estimate £20,000 - £30,000

PERY ET FILS FOR VAN CLEEF & ARPELS, A RED CORAL AND DIAMOND PHILIPPINE RING in 18ct yellow gold, the shoulders set with polished red coral, accented by single cut diamonds, signed VCA and numbered, Pery et Fils maker's mark, French assay marks, size

Estimate £3,000 - £5,000

A LARGE CORAL DRESS RING set with a polished coral bead of 20.9mm, stamped 585, size O1/2 / 7.5, 22.1g. 

Estimate £1,500 - £2,500

A DIAMOND CLUSTER RING set with a cluster of oval and pear cut diamonds totalling 4.7-4.9 carats, stamped 14K, sizing band, size K / 5.25, 9.1g. 

Estimate £4,000 - £6,000

AN IMPORTANT 16.93 CARAT CEYLON SAPPHIRE AND DIAMOND CLUSTER RING set with an oval cut sapphire of 16.93 carats in a cluster of round brilliant cut diamonds, the diamonds totalling 4.0-4.2 carats, stamped 750, size N / 6.75, 11.4g. Accompanied by a f

Estimate £30,000 - £50,000

ANDRE VASSORT FOR VAN CLEEF & ARPELS, A DIAMOND, RUBY, SAPPHIRE AND EMERALD RING in 18ct yellow gold and platinum, the domed centre pave set with round brilliant cut diamonds, accented by cabochon rubies, sapphires and emeralds, the diamonds all tota

Estimate £20,000 - £30,000

CARTIER, A FINE EMERALD AND DIAMOND DRESS RING in platinum, set with an oval cabochon emerald of approximately 3.19 carats in a border of old and Peruzzi cut diamonds, the diamonds all totalling 1.5-1.7 carats, signed Cartier, Cartier maker's mark, F

Estimate £10,000 - £15,000

DAVID WEBB, A DIAMOND BOMBE RING the stylised bombe face set with round brilliant cut diamonds, signed Webb and numbered, no assay marks, size N / 6.75, 21.2g. 

Estimate £3,000 - £5,000

A BRAZILIAN ALEXANDRITE AND DIAMOND RING set with an oval cut alexandrite of 1.59 carats between two fancy cut diamonds, inscribed A159 D0602, stamped Pt900, size L1/2 / 6, 7.1g. Accompanied by a facsimile GIA report stating that the alexandrite is B

Estimate £20,000 - £30,000

PIAGET, A DIAMOND RING in a stylised crossover design, set with round brilliant cut diamonds all totalling 2.0-2.2 carats, signed Piaget and numbered, stamped 750, size K1/2 / 5.5, 17.1g. 

Estimate £1,500 - £2,500

A 3.79 CARAT BURMESE RUBY AND DIAMOND BALLERINA RING set with an oval cut ruby of approximately 3.79 carats in a stylised border of tapered baguette cut diamonds, inscribed R3.79 D1.44, stamped Pt900, size L1/2 / 6, 10.2g. Accompanied by a facsimile

Estimate £6,000 - £8,000

A FRENCH COLOMBIAN EMERALD AND DIAMOND RING in platinum, set with an octagonal step cut emerald of 4.31 carats, the shoulders pave set with round brilliant cut diamonds, French assay marks, size H / 4.5, 6.9g. Accompanied by a facsimile gemmological

Estimate £12,000 - £16,000

BOUCHERON, A GOLD WEDDING BAND RING in 18ct yellow gold, of plain design, signed Boucheron, stamped OR 750, size M1/2 / 6.5, 5.7g. 

Estimate £400 - £600

A 7.32 CARAT CEYLON NO HEAT SAPPHIRE AND DIAMOND DRESS RING set with a cushion cut sapphire of 7.32 carats in a border of pave set round brilliant cut diamonds, the bifurcated band pave set with further diamonds, inscribed S7.32 D0.96, stamped Pt850,

Estimate £7,000 - £9,000

A YELLOW SAPPHIRE AND DIAMOND DRESS RING set with an oval cut yellow sapphire of approximately 9.84 carats, accented by pave set round brilliant cut diamonds totalling 1.6-1.8 carats, stamped PLAT, size K / 5.25, 14.3g. 

Estimate £4,000 - £6,000

A FINE ANTIQUE GEORGIAN DIAMOND AND ENAMEL MOURNING RING, C.1786, in yellow gold, designed as an urn set with an old pear cut diamond measuring 5.4mmx3.8mm, accented by rose cut diamonds, over a blue enamel background, glass covered locket panel to t

Estimate £4,000 - £6,000

AN ART DECO BURMA NO HEAT RUBY AND DIAMOND RING set with an oval cut ruby of approximately 2.35 carats in a double halo of old cut diamonds, no assay marks, size J1/2 / 5, 4.3g. Accompanied by a facsimile gemmological report stating the ruby is of Bu

Estimate £15,000 - £20,000

AN EMERALD AND DIAMOND RING set with a rectangular step cut emerald of approximately 7.35 carats, accented by single cut diamonds, no assay marks, sizing band, size F1/2 / 3, 12.8g. 

Estimate £10,000 - £15,000

A CORAL AND DIAMOND ROSE RING set with a carved coral rose in a border of round brilliant cut diamonds, stamped 750, size M / 6.25, 19.2g. 

Estimate £1,500 - £2,500

A VINTAGE SAPPHIRE AND DIAMOND DRESS RING the stylised ring set with round cut sapphires and round brilliant cut diamonds, stamped 14K, size Q / 8.25, 11.2g.

Estimate £1,000 - £1,500

AN UNHEATED PINK SAPPHIRE AND DIAMOND RING set with an oval cut pink sapphire of approximately 2.36 carats, the shoulders set with baguette cut diamonds, inscribed 2.364 D0.16, stamped Pt850, size K / 5.25, 7.3g. Accompanied by a facsimile gemmologic

Estimate £2,500 - £3,500

AN ORANGE SAPPHIRE AND DIAMOND RING set with an oval cut orange sapphire of approximately 3.29 carats, accented by round brilliant cut diamonds, signed Jupiter, stamped PT950, size L1/2 / 6, 8.7g. 

Estimate £2,000 - £3,000

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 £10,000 - £15,000

FAVERO, A TANZANITE AND DIAMOND DRESS RING in 18ct white gold, set with an oval cabochon tanzanite of approximately 25.81 carats accented by round brilliant cut diamonds, the bands set with further diamonds, the diamonds all totalling 0.9-1.0 carat, 

Estimate £1,200 - £1,600

A RETRO AQUAMARINE DRESS RING in yellow gold, set with an octagonal step cut aquamarine of approximately 24.35 carats, the shoulders designed as stylised bows, no assay marks, size P / 7.75, 11.5g. 

Estimate £1,200 - £1,600

VAN CLEEF & ARPELS, A DIAMOND PHILIPPINE RING in 18ct yellow and white gold, pave set with a section of single cut diamonds, signed VCA and numbered, French assay marks, stamped 750, size K / 5.25, 8.6g. 

Estimate £3,000 - £5,000

AN ANTIQUE FRENCH EMERALD, RUBY AND DIAMOND NAVETTE RING in 18ct yellow gold and silver, the openwork navette face in foliate design, set with round cut emeralds and rubies, accented by rose cut diamonds, French assay marks, size O / 7.25, 5.4g. 

Estimate £1,500 - £2,500

A RUBY AND DIAMOND FLOWER RING set with a round brilliant cut diamond in a cluster of round cut rubies, the shoulders set with further round brilliant cut diamonds, inscribed 1.40 D0.70, stamped Pt900, size N1/2 / 7, 7.9g. 

Estimate £1,000 - £1,500

A DEMANTOID GARNET AND DIAMOND RING set with an oval cut demantoid garnet of 0.45 carats in a cluster of round brilliant cut diamonds, the band accented by further diamonds, inscribed 0.453 D0.84, stamped pt900, size N / 6.75, 6.3g. 

Estimate £1,000 - £1,500

A JADEITE JADE RING set with an oval cabochon jadeite jade, stamped PT950, size K / 5.25, 20.0g. 

Estimate £1,800 - £2,200

A PEARL AND DIAMOND RING set with a pearl of 6.7mm, accented by pave set old European cut diamonds, no assay marks, size K1/2 / 5.5, 3.8g.

Estimate £2,000 - £3,000

A KUNZITE AND DIAMOND DRESS RING set with an oval cut kunzite of 62.81 carats, accented by trios of round brilliant cut diamonds, inscribed 62.81 D0.30, stamped Pt900, size M / 6.25, 33.6g. 

Estimate £1,800 - £2,200

A COLOMBIAN EMERALD AND DIAMOND RING set with a pear cut emerald of approximately 8.17 carats, the border pave set with round brilliant cut diamonds all totalling 1.1-1.3 carats, stamped 750, size N / 6.75, 14.8g. Accompanied by a facsimile GIA repor

Estimate £10,000 - £15,000

VON KÖCK, A SAPPHIRE AND DIAMOND BOMBE RING the bombe ring set with rose cut sapphires and accented by round brilliant cut diamonds, signed Von Köck, stamped 18K, size M1/2 / 6.5, 18.1g. 

Estimate £2,000 - £3,000

A FINE UNHEATED RUBY AND DIAMOND CLUSTER RING set with an octagonal step cut ruby of approximately 4.60 carats in a cluster of round brilliant and tapered baguette cut diamonds, the diamonds totalling 2.4-2.6 carats, stamped 750, size N1/2 / 7, 5.9g.

Estimate £20,000 - £30,000

A PINK SAPPHIRE AND DIAMOND CLUSTER RING set with an oval cut pink sapphire of 2.42 carats in a cluster of round brilliant cut diamonds, inscribed 2.425 0.54, stamped Pt950, size O1/2 / 7.5, 9.5g. Accompanied by a facsimile gemmological report statin

Estimate £4,000 - £6,000

A TSAVORITE GARNET AND DIAMOND HEART RING set with a heart cut tsavorite garnet of approximately 1.85 carats, the shoulders pave set with round brilliant cut diamonds totalling 0.7-0.8 carats, stamped K18, size N1/2 / 7, 7.9g. 

Estimate £1,800 - £2,200

A RUBELLITE TOURMALINE AND DIAMOND DRESS RING set with an oval cut rubellite tourmaline of approximately 4.16 carats, accented by trillion and round brilliant cut diamonds, inscribed 4.16 0.49, stamped Pt900, size K1/2 / 5.5, 8.1g. 

Estimate £1,500 - £2,500

A SAPPHIRE AND DIAMOND DRESS RING set with a cushion cut sapphire of approximately 2.53 carats, within a border of round brilliant and tapered baguette cut diamonds, inscribed 2.533 0.60, stamped Pt900, size K1/2 / 5.5, 6.7g. 

Estimate £1,500 - £2,500

AN EMERALD AND DIAMOND THREE STONE RING set with an octagonal step cut emerald of approximately 1.00 carat, accented on each side by an emerald cut diamond, the diamonds totalling 0.8-1.0 carat, no assay marks, size O1/2 / 7.5, 7.0g.

Estimate £1,800 - £2,200

A SPINEL AND DIAMOND RING set with a round cut spinel of approximately 0.74 carats, accented by round brilliant and marquise cut diamonds, inscribed 0.74 D0.17, stamped K18WG, size L1/2 / 6, 4.6g. 

Estimate £600 - £800

A PEARL AND DIAMOND CLUSTER RING set with a pearl of 14.1mm in a cluster of marquise cut diamonds, the diamonds totalling 1.0-1.2, stamped PLAT, size L1/2 / 6, 14.7g. 

Estimate £1,500 - £2,500

A GREEN TOURMALINE AND DIAMOND RING set with an oval cut green tourmaline of approximately 1.40 carats accented by trios of round brilliant cut diamonds, the band set with further diamonds, inscribed 1.40 D0.21, stamped Pt900, size N1/2 / 7, 6.6g. 

Estimate £500 - £700

A SAPPHIRE AND DIAMOND RING set with an oval cut sapphire of 4.47 carats in a border of tapered baguette cut diamonds, the shoulders set with further diamonds, inscribed 4.47 D1.30, stamped PT900, size O / 7.25, 13.2g. 

Estimate £6,000 - £8,000

A COLOMBIAN EMERALD AND DIAMOND RING set with an octagonal step cut emerald of 1.77 carats, the shoulders set with round brilliant cut diamonds, no assay marks, size J1/2 / 5, 3.8g. Accompanied by a facsimile gemmological report stating the emerald i

Estimate £3,500 - £4,500

FAVERO, A RUBY AND DIAMOND HEART RING in 18ct white gold, set with a heart cut ruby of approximately 1.28 carats, accented by round brilliant cut diamonds, Italian assay marks, stamped 750, size N1/2 / 7, 4.9g. 

Estimate £1,000 - £1,500

A FANCY GREENISH YELLOW DIAMOND RING set with a marquise cut fancy greenish yellow diamond 1.02 carats in a border of round brilliant cut diamonds, stamped 18K, size L1/2 / 6, 4.3g. Accompanied by a facsimile gemmological report stating the principal

Estimate £2,500 - £3,500

A VINTAGE CORAL DRESS RING in 14ct yellow gold, set with a cluster of polished coral beads, accented by ropework, stamped 14K, size K / 5.25, 7.7g. 

Estimate £400 - £600