BULGARI, A CEYLON NO HEAT SAPPHIRE AND DIAMOND RING in 18ct gold, claw set with a rectangular cushion cut sapphire of approximately 3.16 carats, the mount set with round brilliant cut and step cut diamonds all totalling 1.6-1.8 carats, signed Bvlgari

Estimate £12,000 - £16,000

VAN CLEEF & ARPELS, A CORAL AND DIAMOND BOW RING in 18ct yellow gold, designed as a bow set with two cabochon corals, accented by round brilliant cut diamonds, signed VCA and numbered, French assay marks, size K1/2 / 5.5, 4.1g. 

Estimate £2,000 - £3,000

A BURMA NO HEAT RUBY AND DIAMOND RING set with an oval cut ruby of 3.98 carats between two oval cut diamonds, the band accented by a row of round brilliant cut diamonds, no assay marks, size M1/2 / 6.5, 5.5g. Accompanied by a facsimile gemmological r

Estimate £20,000 - £30,000

A FINE ANTIQUE COLOMBIAN EMERALD AND DIAMOND CLUSTER RING set with an octagonal step cut emerald of 3.65 carats in a cluster of old cut diamonds, no assay marks, size R / 8.75, 5.0g. With a gemmological verbal assessment stating that the emerald is o

Estimate £8,000 - £12,000

A RARE 3.05 CARAT PINK DIAMOND AND DIAMOND CLUSTER RING set with a cushion cut pink diamond of 3.05 carats in a cluster of round brilliant cut pink and white diamonds, the bifurcated shoulders set with further diamonds, the accenting diamonds all tot

Estimate £80,000 - £120,000

AN ART DECO BURMA NO HEAT SAPPHIRE AND DIAMOND RING set with an octagonal step cut sapphire of approximately 2.70 carats, the mount accented by single cut diamonds, continental assay marks, size O / 7.25, 7.2g. With a gemmological verbal assessment s

Estimate £15,000 - £20,000

A FINE ART DECO DIAMOND RING set with a central rectangular mixed cut diamond of 2.14 carats, accented by four round brilliant cut diamonds, the shoulders set with single cut diamonds, no assay marks, size N1/2 / 7, 4.7g. Accompanied by a GIA report

Estimate £12,000 - £18,000

A FINE ANTIQUE DIAMOND CLUSTER RING in yellow gold and silver, set with an old cut diamond of approximately 2.09 carats, in a cluster of further old cut diamonds, no assay marks, size O / 7.25, 3.4g.

Estimate £8,000 - £12,000

A FINE COLOMBIAN EMERALD AND DIAMOND RING set with an octagonal step cut emerald of 4.04 carats, the mount set with round brilliant cut diamonds and calibre cut emeralds, no assay marks, size P / 7.75, 5.0g. With a gemmological verbal assessment stat

Estimate £8,000 - £12,000

POMELLATO, A CITRINE STARFISH RING in 18ct rose gold, designed as a starfish, set throughout with cabochon and round cut citrines, signed Pomellato, stamped 750, size P1/2 / 8, 39.4g. 

Estimate £2,500 - £3,500

A DIAMOND AND COLOURED DIAMOND DRESS RING in 18ct white gold, set with a central baguette cut diamond accented by irradiated round cut pink, blue, yellow and green diamonds, full British hallmarks, size S / 9, 15.6g.

Estimate £1,000 - £1,500

AN AQUAMARINE DIAMOND RING set with a mixed cut aquamarine of 34.53 carats, the shoulders set with baguette and round brilliant cut diamonds, inscribed 35.42 0.70, stamped Pt900, size M / 6.25, 23.2g. 

Estimate £4,000 - £6,000

A FINE BURMA NO HEAT SAPPHIRE AND DIAMOND RING set with an oval cabochon blue sapphire of 12.32 carats in a cluster of old cut diamonds, no assay marks, size P1/2 / 8, 7.5g. Accompanied by a gemmological report stating that the sapphire is of Burmese

Estimate £20,000 - £30,000

BOUCHERON, A DIAMOND, SAPPHIRE AND TSAVORITE GARNET PANDA RING designed as a panda bear, pave set with round brilliant cut diamonds and round cut sapphires, its paws holding a cabochon sapphire resting on a branch set with round cut tsavorite garnets

Estimate £8,000 - £12,000

A FANCY LIGHT YELLOW-GREEN DIAMOND RING set with a cushion cut green diamond of 1.58 carats, accented by two rows of round brilliant cut diamonds, no assay marks, size M / 6.25, 9.1g. Accompanied by a facsimile GIA report stating that the diamond is 

Estimate £6,000 - £8,000

A FINE COLOMBIAN EMERALD AND DIAMOND THREE STONE RING set with an octagonal step cut emerald of 6.91 carats between two round brilliant cut diamonds of 1.03 and 1.02 carats, no assay marks, size O / 7.25, 5.7g. 

Estimate £20,000 - £30,000

A FINE TSAVORITE GARNET AND DIAMOND CLUSTER RING set with an oval cut tsavorite garnet of 3.62 carats in a cluster of round brilliant cut diamonds, inscribed 3.623 D1.97, stamped Pt900, size M / 6.25, 9.0g. 

Estimate £8,000 - £12,000

A SAPPHIRE AND DIAMOND DRESS RING set with a cabochon sapphire of 10.48 carats, accented by round brilliant cut diamonds, inscribed 10.48 D0.54, stamped K18, size K / 5.25, 12.6g. 

Estimate £3,000 - £5,000

A CEYLON NO HEAT SAPPHIRE AND DIAMOND CLUSTER RING set with a cushion cut sapphire of 5.10 carats in a cluster of old cut diamonds, the diamonds totalling 2.0-2.5 carats, no assay marks, size L1/2 / 6, 5.4g. Accompanied by a gemmological report stati

Estimate £10,000 - £15,000

A FINE COLOMBIAN EMERALD AND DIAMOND RING set with an octagonal step cut emerald of 5.48 carats in a cluster of round brilliant cut diamonds, inscribed E5.48 D0.89, stamped Pt900, size M / 6.25 9.5g. Accompanied by a gemmological report stating that

Estimate £12,000 - £18,000

A FINE AQUAMARINE AND DIAMOND CLUSTER RING set with an octagonal step cut aquamarine of approximately 11.50 carats in a cluster of diamonds all totalling 3.8-4.4 carats, stamped 750, size P / 7.75, 12.5g.

Estimate £5,000 - £7,000

AN ANTIQUE GEORGIAN AMETHYST AND PEARL RING, EARLY 19TH CENTURY in yellow gold, set with a polished cushion shaped cabochon amethyst in a border of pearls, accented to the shouldAMETHYST AND SPLIT PEARL RING in gold, approximate finger size L, 4.5g. 

Estimate £600 - £800

TIFFANY & CO., A DIAMOND VICTORIA FULL ETERNITY RING set all around with clusters of four marquise cut diamonds designed in a floral motif, accented by round brilliant cut diamonds, the diamonds totalling approximately 1.93 carats, signed T & Co. and

Estimate £6,000 - £8,000

A FINE NATURAL FANCY YELLOW DIAMOND AND WHITE 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 th

Estimate £12,000 - £18,000

A DIAMOND DRESS RING set with five rows of round brilliant cut diamonds all totalling 5.5-6.0 carats, stamped 18K, size T1/2 / 9.75, 15.4g. 

Estimate £3,000 - £5,000

CARTIER, A DIAMOND AND ROCK CRYSTAL RING, 1992 in 18ct yellow gold, comprising a section of round brilliant cut diamonds beneath a polished rock crystal dome, Cartier signature obscured, dated 1992, size K / 5.25, 14.2g. 

Estimate £2,500 - £3,500

A VINTAGE CITRINE DRESS RING in yellow gold, set with an oval cut citrine, no assay marks, size M / 6.25, 19.2g. 

Estimate £1,000 - £1,500

ATTR. ROBERTO COIN, AN ENAMEL, RUBY AND DIAMOND FISH RING designed as a coiled fish, relieved in black enamel and accented by round brilliant cut diamonds, the eyes set with round cabochon rubies, Italian assay marks, size R / 8.5, 17.7g. 

Estimate £2,000 - £3,000

A SAPPHIRE AND DIAMOND RING set with an oval cut sapphire of 4.47 carats in a border of tapered baguette cut diamonds, inscribed 4.47 D1.30, stamped Pt900, size O1/2 / 7.5, 13.2g. 

Estimate £7,000 - £9,000

A FINE COLOMBIAN EMERALD AND DIAMOND RING in 18ct yellow gold, set with an oval cut emerald of 2.69 carats between two heart cut diamonds both totalling 0.35 carats, French assay marks, size J1/2 / 5, 4.4g. Accompanied by a facsimile GIA report stati

Estimate £6,000 - £8,000

AN IMPORTANT 30.75 CARAT BURMA NO HEAT PURPLE SAPPHIRE RING in platinum, set with a cushion cut purple sapphire of 30.75 carats, full British hallmarks, stamped PT950, size M / 6.25, 16.2g. Accompanied by a Gubelin report stating that the purple sapp

Estimate £200,000 - £300,000

AN ALEXANDRITE AND DIAMOND RING set with three oval cut alexandrites accented by a row of baguette cut diamonds, accented by rows of round brilliant cut diamonds, the alexandrites all totalling 0.38 carats, the diamonds all totalling 0.69 carats, ins

Estimate £2,500 - £3,500

A FINE BURMESE RUBY AND DIAMOND RING set with an oval cut ruby of 2.62 carats in a cluster of round brilliant cut diamonds, the shoulders set with baguette and round brilliant cut diamonds, inscribed R2.62 D 1.72, stamped Pt900, size O1/2 / 7.5, 13.0

Estimate £6,000 - £8,000

A TURQUOISE AND DIAMOND DRESS RING set with fancy shaped sections of turquoise and accented by pave set round brilliant cut diamonds, stamped Au750, size P / 7.75, 17.8g. 

Estimate £3,000 - £5,000

A COLOMBIAN EMERALD AND DIAMOND RING set with an octagonal step cut emerald of 2.10 carats between two baguette cut diamonds, inscribed E2.10 D0.29, stamped Pt900, size M / 6.25, 7.2g. Accompanied by a facsimile gemmological report stating that the e

Estimate £5,000 - £7,000

A COLOURED DIAMOND DRESS RING set with a marquise cut fancy intense orange-yellow diamond of 0.44 carats accented by alternating sections of round brilliant cut pink and white diamonds, inscribed 0.417 D0.44 0.416, stamped Pt950, size L / 5.75, 7.5g.

Estimate £2,500 - £3,500

A FINE UNHEATED SPINEL AND DIAMOND RING set with a cushion cut spinel of approximately 2.88 carats, accented on each side by baguette cut diamonds, no assay marks, size O1/2 / 7.5, 3.0g. Accompanied by a gemmological report stating that the spinel is

Estimate £3,000 - £5,000

AN ANTIQUE DIAMOND CLUSTER RING, 19TH CENTURY in yellow gold and silver, set with an old cut diamond of approximately 1.22 carats in a cluster of old cut diamonds, no assay marks, size L / 5.75, 4.8g. 

Estimate £3,000 - £5,000

A RUBY AND DIAMOND CLUSTER RING set with an oval cut ruby of approximately 1.25 carats in a cluster of round brilliant cut diamonds, stamped 14K, size M / 6.25, 5.0g. 

Estimate £2,500 - £3,500

MARINA B, A SAPPHIRE AND DIAMOND RING set with a pear cut sapphire, the band pave set with round brilliant cut diamonds, signed Marina B, stamped 750, size N1/2 / 7, 4.1g. 

Estimate £1,000 - £15,000

A DIAMOND AND SAPPHIRE TARGET RING set with a round brilliant cut diamond in concentric borders of calibre cut sapphires and further round brilliant cut diamonds, stamped 750, size N1/2 / 7, 3.6g. 

Estimate £2,000 - £3,000

A RUBY AND DIAMOND CLUSTER RING set with an oval cut ruby of approximately 2.42 carats in a cluster of round brilliant cut diamonds, stamped 18ct plat, size O / 7.25, 4.3g. 

Estimate £3,000 - £5,000

A MUGHAL CARVED EMERALD AND DIAMOND RING set with a large Mughal carved emerald, accented by pave set round brilliant cut diamonds, stamped 18K, size O1/2 / 7.5, 36.0g. 

Estimate £5,000 - £7,000

A STAR SAPPHIRE AND DIAMOND CLUSTER RING set with a cabochon star sapphire of approximately 12.89 carats in a cluster of round brilliant cut diamonds, no assay marks, size M1/2 / 6.5, 8.4g. 

Estimate £2,000 - £3,000

A FINE EMERALD AND DIAMOND RING set with an octagonal step cut emerald of approximately 1.28 carats in a border of pear and round brilliant cut diamonds, the band set with further diamonds, stamped 18K, size N / 6.75, 4.2g. 

Estimate £4,000 - £6,000

AN INVISIBLY SET SAPPHIRE BOMBE RING the domed ring set with seven rows of invisibly set square step cut sapphires, stamped 750, size L / 5.75, 9.1g. 

Estimate £4,000 - £6,000

AN ORANGE SAPPHIRE AND DIAMOND RING set with an octagonal step cut orange sapphire of 6.52 carats, the stepped shoulders set with single cut diamonds, no assay marks, size O1/2 / 7.5, 5.9g. 

Estimate £3,000 - £5,000

AN UNHEATED PURPLISH PINK SAPPHIRE AND DIAMOND RING set with a cushion cut pink sapphire of 3.05 carats in a cluster of round brilliant cut diamonds,  inscribed 3.05 D2.44, stamped Pt900, size L1/2 / 6, 10.6g. Accompanied by a facsimile GIA report st

Estimate £8,000 - £12,000

A GREEN TOURMALINE AND DIAMOND RING set with an oval cut green tourmaline of 2.82 carats, the stepped shoulders set with round brilliant cut diamonds, inscribed 2.82 D0.50, stamped Pt900, size M / 6.25, 12.7g.

Estimate £1,200 - £1,600

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 shoulders set with further diamonds, inscribed 0453 D0.84, stamped Pt900, size N / 6.75, 6.3g. 

Estimate £1,000 - £1,500

A VINTAGE EMERALD AND DIAMOND DRESS RING in 18ct white gold, set with an oval cabochon emerald of approximately 7.10 carats, the shoulders set with tapered baguette cut diamonds, stamped 18K, size M / 6.25, 6.5g.

Estimate £2,000 - £3,000

SABBADINI, A SAPPHIRE AND EMERALD BOMBE RING in honeycomb design, set with hexagonal step cut sapphires and emeralds, signed Sabbadini Milano, stamped 750, size M1/2 / 6.5, 14.7g. 

Estimate £4,000 - £6,000

A 13.17 CARAT SAPPHIRE AND DIAMOND CLUSTER RING set with a cushion cut sapphire of 13.17 carats in a cluster of round brilliant cut diamonds, the bifurcated shoulders set with further round brilliant cut diamonds, the diamonds all totalling 2.8-3.0 c

Estimate £20,000 - £30,000

AN ANTIQUE DIAMOND RING, 19TH CENTURY in yellow gold and silver, set to the centre with a rose cut diamond of 0.97 carats, accented by rose and old cut diamonds, the diamonds all totalling 3.5-4.0 carats, no assay marks, size N1/2 / 7, 5.2g. 

Estimate £4,000 - £6,000

A FINE UNHEATED SAPPHIRE AND DIAMOND RING set with a cushion cut sapphire of 4.05 carats between two half moon cut diamonds both totalling 0.55 carats, stamped PLAT, size N / 6.75, 5.5g. Accompanied by a facsimile GIA report stating that the sapphire

Estimate £8,000 - £12,000

AN ANTIQUE DIAMOND THREE STONE RING in yellow gold and silver, set with three rose cut diamonds, no assay marks, size P / 7.75, 4.7g. 

Estimate £6,000 - £8,000

A CEYLON SAPPHRIE AND DIAMOND RING set with an octagonal step cut sapphire of 6.86 carats, accented on each side by a trillion cut diamond, the band set with round brilliant cut diamonds, stamped 18K, size N / 6.75, 4.7g. Accompanied by a gemmologica

Estimate £8,000 - £12,000

BULGARI, A FINE 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

Estimate £15,000 - £20,000

A CEYLON NO HEAT YELLOW SAPPHIRE AND DIAMOND RING set with a cushion cut yellow sapphire of 9.16 carats between two tapered baguette cut diamonds, marked indistinctly, size M / 6.25, 7.3g. Accompanied by a facsimile GIA report stating that the yellow

Estimate £6,000 - £8,000

A MOONSTONE, GREEN TOURMALINE, TSAVORITE GARNET, CAT'S EYE CHRYSOBERYL AND DIAMOND COCKTAIL RING set with a large cabochon green moonstone of 58.34 carats in a border of variously cut green tourmalines, tsavorite garnets, cat's eye chrysoberyls and d

Estimate £2,500 - £3,500

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 £3,000 - £5,000

A RUBY AND DIAMOND CLUSTER RING set with an oval cabochon ruby of approximately 7.01 carats in a cluster of single cut diamonds, no assay marks, size M / 6.25, 5.1g. 

Estimate £3,500 - £4,500

A SAPPHIRE AND DIAMOND RING set with a cushion cut sapphire of 24.19 carats in a border of tapered baguette and round brilliant cut diamonds, inscribed 24.197 D2.58, stamped Pt900, size M1/2 / 6.5, 28.3g.

Estimate £10,000 - £15,000

VHERNIER, A PINK CHALCEDONY WAVE RING in 18ct gold, the undulating body set with a polished piece of pink chalcedony, signed Vhernier and numbered, stamped 750, size K1/2 / 5.75, 12.9g.

Estimate £1,500 - £2,500

AN ANTIQUE DIAMOND CROWN RING in yellow gold and silver, set with a pear shaped rose cut diamond measuring approximately 9.8mm x 9.0mm, surmounted by a crown set with further rose cut diamonds, no assay marks, size O1/2 / 7.5, 3.7g.  

Estimate £6,000 - £8,000

AN ANTIQUE EMERALD AND DIAMOND LOCKET RING in yellow gold and silver, set with a cushion cut emerald of approximately 0.70 carats in a cluster of old cut diamonds, with a locket compartment to the reverse, no assay marks, sizeL / 5.75, 4.0g. 

Estimate £1,500 - £2,500

A FINE EMERALD AND DIAMOND THREE STONE RING set with an octagonal step cut emerald of 1.21 carats between two round brilliant cut diamonds, stamped IRID PLAT, size K / 5.25, 4.1g. 

Estimate £4,000 - £6,000

A GREEN TOURMALINE AND DIAMOND RING set with an oval cut green tourmaline of 1.11 carats, accented by two rows of round brilliant cut diamonds, inscribed 1.11ct D0.25, stamped Pt900, size O / 7.25, 8.6g.

Estimate £700 - £900

A GREEN TOURMALINE AND DIAMOND RING set with a fancy cut green tourmaline of 4.82 carats, accented by round brilliant cut diamonds, inscribed 4824 0156, stamped Pt900, size M / 6.25, 10.3g. 

Estimate £1,000 - £1,500

A VINTAGE TURQUOISE AND LAPIS LAZULI COCKTAIL RING set with a cabochon turquoise in a border of marquise cabochon lapis lazuli and turquoise, accented by rope work, stamped 14K, size M / 6.25, 8.1g.

Estimate £1,000 - £1,500

A SAPPHIRE AND DIAMOND RING set with a cushion cut sapphire of 3.62 carats in a double halo of round brilliant cut diamonds, the bifurcated band set with further diamonds, stamped PLAT, size L / 5.75, 10.4g. 

Estimate £5,000 - £7,000

A SAPPHIRE AND DIAMOND CLUSTER RING set with an oval cut sapphire of 0.82 carats in a cluster of round brilliant cut diamonds, inscribed 0.82 0.48, stamped Pt900, size M / 6.25, 3.8g. 

Estimate £600 - £800

AN ANTIQUE RUBY AND DIAMOND RING in yellow gold and silver, set with an oval ruby in a cluster of rose cut diamonds, no assay marks, size N 1/2 / 7, 4.54g. 

Estimate £3,000 - £5,000

A RUBY AND DIAMOND DRESS RING set with a round brilliant cut diamond and four oval cut rubies, accented by a border of round brilliant cut diamonds, inscribed 2.85 D 0.70, stamped Pt900, size L / 5.75, 10.3g. 

Estimate £1,500 - £2,500

MARINA B., A PURPLE SAPPHIRE AND DIAMOND RING set with a pear cut purple sapphire, the band pave set with round brilliant cut diamonds, signed Marina B, stamped 750, size M1/2 / 6.5, 4.5g. 

Estimate £1,200 - £1,600

A RUBELLITE TOURMALINE AND DIAMOND RING set with an oval cut rubellite of 4.16 carats, the shoulders set with trillion and round brilliant cut diamonds, inscribed 4.16 D 0.49, stamped Pt900, size L / 5.75, 8.0g. 

Estimate £1,500 - £2,500

A FINE ART DECO RUBY AND DIAMOND RING set with a cushion cut ruby of 2.64 carats, accented by single cut diamonds, no assay marks, size M1/2 / 6.5, 4.0g. 

Estimate £4,000 - £6,000

A BURMA NO HEAT STAR RUBY AND DIAMOND RING set with an oval cabochon star ruby of 13.61 carats, accented by round brilliant cut diamonds, inscribed 13.61 0.76, stamped Pt900, size M / 6.25, 12.7g. Accompanied by a gemmological report stating that the

Estimate £6,000 - £8,000

BOUCHERON, A SOLITAIRE DIAMOND FACETTE RING in platinum, set with a round brilliant cut diamond of 0.54 carats, the band of facetted design, signed Boucheron and numbered, French assay marks, size G1/2 / 3.5, 4.5g. Accompanied by a gemmological repor

Estimate £1,500 - £2,500

A PINK SAPPHIRE AND DIAMOND HEART RING set with a heart cut pink sapphire of 2.13 carats in a border of round brilliant cut diamonds, inscribed 2.134 0.53, stamped Pt900, size L1/2 / 6, 5.7g. 

Estimate £1,200 - £1,600

A BURMA NO HEAT SAPPHIRE AND DIAMOND RING set with a cushion cut sapphire of 2.71 carats, the band accented by round brilliant cut diamonds, stamped PLAT, size M / 6.25, 4.1g. With a gemmological verbal assessment stating that the sapphire is of Burm

Estimate £5,000 - £7,000

A FINE RUBY AND DIAMOND RING set with a cushion cut ruby of 2.01 carats, the band set with princess and round brilliant cut diamonds, the diamonds all totalling 1.0-1.1 carats, stamped 750, size L / 5.75, 5.3g.

Estimate £5,000 - £7,000

SILVIA FURMANOVICH, A PAINTED WOOD AND DIAMOND BUTTERFLY RING the butterfly comprising carved and painted wood, the band set all around with a row of round brilliant cut diamonds, SF maker's mark, stamped 750, size M1/2 / 6.5, 7.8g. 

Estimate £1,000 - £1,500

A BURMA NO HEAT SAPPHIRE AND DIAMOND RING set with an oval cut sapphire of 1.80 carats, the band accented by baguette and round brilliant cut diamonds, stamped K18 Pt950, size N / 6.75, 8.0g. Accompanied by a facsimile gemmological report stating tha

Estimate £6,000 - £8,000

A BURMESE RUBY AND DIAMOND THREE STONE RING set with an octagonal step cut ruby of 1.25 carats between two baguette cut diamonds both totalling 0.36 carats, inscribed 1.251 0.36, stamped Pt900, size L / 5.75, 4.3g. 

Estimate £2,500 - £3,500