BULGARI, A DIAMOND AND EMERALD RING in 18ct yellow gold, set with an oval brilliant cut diamond of approximately 0.60 carats between two pear cut emeralds, signed Bvlgari, London import marks, size L1/2 / 6, 14.5g. 

Estimate £2,000 - £3,000

CARTIER, A VINTAGE EMERALD AND ONYX DOUBLE PANTHERE RING in 18ct yellow gold, designed as two coiled panthers, the eyes set with round cut emeralds, the noses set with polished onyx, signed Cartier and numbered, stamped 750, size J1/2 / 5, 14.2g. Acc

Estimate £3,500 - £4,500

A 2.56 CARAT SOLITAIRE DIAMOND RING in 18ct yellow gold, set with an old cut diamond of 2.56 carats, partial British hallmarks, size P / 7.5, 5.2g. 

Estimate £4,500 - £5,500

VAN CLEEF & ARPELS, A VINTAGE LAPIS LAZULI AND DIAMOND DRESS RING in 18ct yellow gold, set with alternating sections of polished lapis lazuli and pave set round brilliant cut diamonds, signed VCA France, maker's mark, French assay marks, size M / 6.2

Estimate £5,000 - £7,000

A DIAMOND AND RUBY MARQUISE RING set with a marquise cut diamond of approximately 1.40 carats in a border of calibre cut rubies, the shoulders set with round brilliant cut diamonds, no assay marks, size K / 5.25, 4.5g. 

Estimate £3,000 - £5,000

A FANCY DEEP BROWNISH YELLOW DIAMOND AND WHITE DIAMOND RING set with a round brilliant cut fancy deep brownish yellow diamond of 3.00 carats, accented on each side by a bullet cut diamond, the diamonds both totalling 0.43 carats, stamped PT, size N /

Estimate £4,000 - £6,000

TIFFANY & CO., A DIAMOND ETOILE RING the wide band set with round brilliant cut diamonds, signed T&Co, stamped 750 PT950, size S / 9.25, 11.9g. 

Estimate £1,200 - £1,600

BUCCELLATI, A DIAMOND BAND RING set with two rows of round brilliant cut diamonds, the band with rigatto engraving, signed M. Buccellati, stamped 750, size M / 6.25, 5.9g. 

Estimate £5,000 - £7,000

A SAPPHIRE AND DIAMOND CLUSTER RING in 18ct yellow gold, set with an oval cut sapphire of 2.87 carats in a cluster of round brilliant cut diamonds, the diamonds all totalling 2.8-3.0 carats, London import marks, size P1/2 / 7.75, 6.4g. 

Estimate £3,000 - £5,000

BULGARI, A MULTI GEM FLOWER CONTRAIRE DRESS RING in crossover design, one end designed as a flower set with a round brilliant cut diamond in a cluster of pear cut pink, purple, green and orange sapphires, the other end set with a pearl of 9.7mm, the

Estimate £4,000 - £6,000

H. STERN, A BLUE TOPAZ GOLDEN STONES RING set with an oval cabochon blue topaz, the band with a brushed finish, H. Stern maker's mark, stamped 750, size N / 6.75, 29.8g. 

Estimate £2,000 - £3,000

AN ANTIQUE DIAMOND, EMERALD AND SAPPHIRE DRESS RING, EARLY 20TH CENTURY the navette shaped ring set with old cut diamonds, within a foliate style border set with alternating calibre cut emeralds and sapphires and further old and round cut diamonds, n

Estimate £1,000 - £1,500

AN IMPORTANT ALEXANDRITE AND DIAMOND CLUSTER RING in platinum, set with a cushion cut alexandrite of 2.42 carats in a cluster of round brilliant cut diamonds, further round brilliant cut diamonds set to the shoulders, the diamonds totalling 2.38 cara

Estimate £60,000 - £80,000

MAUBOUSSIN, A DIAMOND RING in 18ct white gold, set with an old mine cut diamond of 2.40 carats, accented by trios of marquise and round brilliant cut diamonds, signed Mauboussin Paris, French assay marks, size P / 7.75, 5.0g. 

Estimate £5,000 - £7,000

A DIAMOND AND SAPPHIRE DRESS RING set with an old cushion cut diamond of 3.49 carats, in a border of round brilliant cut diamonds accented by French cut sapphires, stamped 18K, size M1/2 / 6.5, 5.7g. 

Estimate £12,000 - £16,000

A RUBY AND DIAMOND DRESS RING set with a cushion cut ruby within a tapering row of calibre cut rubies, accented by rows of round brilliant cut diamonds, stamped PLAT, size M1/2 / 6.5, 6.1g. 

Estimate £2,000 - £3,000

A SAPPHIRE AND DIAMOND CLUSTER RING set with an oval cut sapphire of approximately 2.95 carats in a border of round brilliant cut diamonds, stamped 14K, size M1/2 / 6.5, 4.6g. 

Estimate £1,200 - £1,600

BLACK, STARR & FROST, A FINE COLOMBIAN MINOR EMERALD AND DIAMOND RING set with a cabochon emerald of approximately 7.91 carats, the shoulders set with old cut diamonds, B.S.&F maker's mark, stamped 18K, size I / 4.25, 4.7g. Accompanied by a facsimile

Estimate £20,000 - £25,000

MARIO BUCCELLATI, A CHRYSOPRASE RING set with an oval cabochon chrysoprase, signed M. Buccellati, stamped 750, size Q / 8, 16.2g. 

Estimate £3,500 - £4,500

A MODERNIST GREEN TOURMALINE AND DIAMOND DRESS RING in yellow gold, set with an octagonal step cut green tourmaline of approximately 6.57 carats, the textured mount accented by single cut diamonds, marked indistinctly, size V / 10.5, 25.9g.  

Estimate £2,500 - £3,500

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 £150,000 - £250,000

A FINE THREE STONE DIAMOND RING in 18ct white gold, set with a round brilliant cut diamond of 4.02 carats between two pear cut diamonds, the accenting diamonds both totalling 0.65 carats, partial British hallmarks, size L1/2 / 6, 6.0g. Accompanied by

Estimate £12,000 - £16,000

MARCHAK, A CEYLON NO HEAT PINK SAPPHIRE AND DIAMOND RING in 18ct yellow gold and platinum, set with an oval cut pink sapphire of approximately 3.33 carats, accented by princess cut diamonds, signed Marchak, French assay marks, sizing band, size L / 5

Estimate £10,000 - £15,000

A FINE KUNZITE AND DIAMOND DRESS RING in 18ct yellow gold, set with an oval cut kunzite of approximately 71.00 carats, the stylised shoulders set with round brilliant cut diamonds, the diamonds all totalling 3.6-3.8 carats, no assay marks, size K / 5

Estimate £7,000 - £9,000

GUCCI, A HORSE BIT RING the crossover ring designed as a horse bit, signed Gucci, stamped Au750, size Q1/2 / 8.5, 18.9g. 

Estimate £1,000 - £1,500

TIFFANY & CO., A DIAMOND FULL ETERNITY RING channel set all around with round brilliant cut diamonds all totalling 0.45 carats, signed Tiffany & Co., stamped 750, size J / 4.75, 2.3g. 

Estimate £1,500 - £2,500

CARTIER, A DIAMOND LOVE RING in 18ct rose gold, the band pave set throughout with round brilliant cut diamonds, punctuated by six screw head motifs, signed Cartier and numbered, Swiss assay marks, stamped Au 750, size N1/2 / 7, 10.9g. Accompanied by

Estimate £4,000 - £6,000

A FINE AQUAMARINE AND DIAMOND RING set with a large octagonal step cut aquamarine of 42.59 carats, the openwork mount in foliate design, accented by round brilliant cut diamonds, stamped 750 PLAT, size M / 6.25, 21.9g. 

Estimate £5,000 - £7,000

A VINTAGE DIAMOND, RUBY AND SAPPHIRE GYPSY RING in yellow gold, the tapering band set with a round brilliant cut diamond of approximately 0.30 carats between a round cut ruby and sapphire, no assay marks, size P / 7.75, 9.6g. 

Estimate £2,000 - £3,000

BOODLES, A DIAMOND SPINNING ETERNITY RING in 18ct white and yellow gold, comprising two spinning bands, one with engraved details and set with a round brilliant cut diamond within the letter W, the other spinning band set all around with round brilli

Estimate £700 - £900

A RUBY AND DIAMOND THREE STONE RING set with a cabochon ruby between two round brilliant cut diamonds, stamped 18K, size M / 6.25, 6.4g. 

Estimate £1,500 - £2,500

CHIMENTO, A CHALCEDONY RING set with a pointed white chalcedony, signed Chimento, stamped 750, size N / 6.75, 14.2g. 

Estimate £800 - £1,200

GUCCI, A DIAMOND ICON RING in 18ct white gold, the band with a row of alternating double G motifs and round brilliant cut diamonds, signed Gucci, stamped Au750, size M1/2 / 6.5, 4.6g. 

Estimate £400 - £600

A SAPPHIRE AND DIAMOND BALLERINA RING set with a cushion cut sapphire of 7.73 carats in an undulating border set with round brilliant and tapered baguette cut diamonds, the diamonds all totalling 3.04 carats, inscribed 7.732 3.04, stamped Pt900, size

Estimate £4,000 - £6,000

MAUBOUSSIN, AN AMETHYST, RUBY AND DIAMOND DRESS RING in 18ct white gold, set with a fancy cut frosted amethyst, accented by round cut rubies and round brilliant cut diamonds, Mauboussin Paris and numbered, French assay marks, size  K / 5.25, 17.7g. 

Estimate £2,000 - £3,000

CARTIER, A DIAMOND AND CERAMIC LOVE RING in 18ct white gold, the band pave set throughout with round brilliant cut diamonds, punctuated by six screw motifs set with ceramic, one ceramic motif damaged, signed Cartier and numbered, Swiss assay marks, s

Estimate £3,500 - £4,500

AN UNHEATED TEAL SAPPHIRE AND DIAMOND DRESS RING set with an oval cut teal sapphire of approximately 30.51 carats, the band set with staggered round brilliant cut diamonds, no assay marks, size K1/2 / 5.5, 14.7g. 

Estimate £8,000 - £12,000

CARTIER, A DIAMOND DRESS RING in 18ct white gold, pave set with round brilliant cut diamonds, the diamonds totalling 1.0-1.2 carats, signed Cartier and numbered, French assay marks, stamped Au750, size H / 3.75, 6.1g. Accompanied by a Cartier certifi

Estimate £2,500 - £3,500

A 20.85 CARAT PARAIBA-TYPE TOURMALINE AND DIAMOND RING in 18ct white gold, set with an oval cut tourmaline of 20.85 carats in a border of round brilliant cut diamonds, the stylised shoulders set with further round brilliant cut diamonds, the diamonds

Estimate £20,000 - £25,000

A SOLITAIRE DIAMOND RING set with a round brilliant cut diamond of approximately 4.91 carats between two tapered baguette cut diamonds, stamped 10% IRID PLAT, size M / 6.25, 7.2g. 

Estimate £15,000 - £20,000

CARTIER, A DIAMOND FULL ETERNITY RING in platinum, set all around with a row of round brilliant cut diamonds all totalling approximately 1.20 carats, JC maker's mark, full British hallmarks, size M / 6.25, 4.5g. 

Estimate £4,000 - £6,000

RUSER, A BAROQUE PEARL AND DIAMOND DRESS RING set with a baroque pearl, accented by a marquise cut diamond and a row of round brilliant cut diamonds, signed Ruser, stamped 10% idid plat, size L1/2 / 6, 12.0g. 

Estimate £3,000 - £5,000

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 - £40,000

STEPHEN WEBSTER, A MULTI GEM HERMIT CRAB RING in 18ct yellow gold, designed as a hermit crab, the shell set with a slice of synthetic opal topped by a faceted rock crystal, accented by round cut rubies, orange sapphires, yellow sapphires and round br

Estimate £3,500 - £4,500

VAN CLEEF & ARPELS, AN ONYX, EMERALD AND DIAMOND SWAN RING in 18ct yellow gold, in crossover design, designed as two swan heads set with fluted onyx, accented by round cut emeralds and round brilliant cut diamonds, inscribed X14 0.83CT, signed VCA an

Estimate £7,000 - £9,000

A FRENCH RUTILATED QUARTZ DRESS RING in 18ct yellow gold, set with a large round cabochon rutilated quartz, French maker's mark, French assay marks, size O / 7.25, 47.7g. 

Estimate £2,500 - £3,500

TIFFANY & CO., A DIAMOND T TRUE WIDE RING in 18ct yellow gold, the openwork band designed as a row of T motifs, set throughout with round brilliant cut diamonds, the diamonds totalling 0.9-1.0 carats, signed Tiffany & Co., partial British hallmarks,

Estimate £3,000 - £5,000

VAN CLEEF & ARPELS, A DIAMOND DRESS RING in 18ct yellow gold, designed as a stylised bow set throughout with round brilliant cut diamonds, inscribed 94, signed VCA and numbered, French assay marks, size S / 9, 13.5g. 

Estimate £5,000 - £7,000

AN ANTIQUE CEYLON NO HEAT SAPPHIRE AND DIAMOND CLUSTER RING in yellow gold, set with an oval cut sapphire of approximately 5.00 carats in a cluster of old cut diamonds, the diamonds all totalling 1.4-1.6 carats, no assay marks, size J1/2 / 5.5, 5.3g.

Estimate £5,000 - £7,000

CARTIER, A GOLD TRINITY RING in 18ct yellow, white and rose gold, comprising three interlocking tricolour rings, signature worn from use, Swiss assay marks, size O / 7.25, 14.5g. Accompanied by the original Cartier purchase receipt. 

Estimate £600 - £800

A THREE STONE DIAMOND RING set with three round brilliant cut diamonds, the diamonds totalling 3.03 carats, inscribed 3/3.03, stamped 9K, size U / 10.25, 7.6g. 

Estimate £4,500 - £5,500

A CORAL AND DIAMOND RING set with a large round cabochon coral of 19.6mm, the shoulders set with fancy cut diamonds, stamped PLATINUM, size M1/2 / 6.5, 17.2g. 

Estimate £1,500 - £2,500

A TURQUOISE AND DIAMOND DRESS RING set with a cabochon turquoise in a stylised border set with single cut diamonds, no assay marks, size M / 6.25, 13.7g. 

Estimate £2,000 - £3,000

AN ANTIQUE DIAMOND AND ENAMEL RING in yellow gold, the oval face with an applied E surmounted by a crown set with rose cut diamonds, over a ground of blue enamel and accented by a border of further rose cut diamonds, the reverse engraved Elisabeth 18

Estimate £2,500 - £3,500

AN EMERALD AND DIAMOND THREE STONE RING set with a pear cut emerald between two pear cut diamonds, accented on each side by pairs of tapered baguette cut diamonds, stamped 750, size M / 6.25, 4.8g. 

Estimate £1,000 - £1,500

A DIAMOND DRESS RING in cross over design, pave set with a section of round brilliant cut diamonds all totalling 1.5-1.7 carats, signed Princess, stamped 750, size Q / 8, 8.3g. 

Estimate £1,200 - £1,600

A RUBY AND DIAMOND RING set with a marquise cut ruby of approximately 2.15 carats in a cluster of marquise and pear cut diamonds, the diamonds all totalling 1.6-1.8 carats, stamped 18K, size L1/2 / 6, 8.5g. 

Estimate £5,000 - £7,000

CARTIER, AN EMERALD AND ENAMEL DOUBLE PANTHERE RING in 18ct yellow gold, the open band designed as two panthers, the eyes set with round cut emeralds, the spots decorated with black enamel, signed Cartier and numbered, stamped 750, size N1/2 / 7, 16.

Estimate £7,000 - £9,000

A DIAMOND AND EMERALD FULL ETERNITY RING set with three rows of round brilliant cut diamonds and round cut emeralds, the diamonds all totalling 2.0-2.2 carats, no assay marks, size N / 6.75, 84g. 

Estimate £2,500 - £3,500

A 3.51 CARAT E COLOUR SOLITAIRE DIAMOND ENGAGEMENT RING in platinum, set with a princess cut diamond of 3.51 carats, full British hallmarks, size M / 6.25, 15.3g. Accompanied by a GIA report stating that the diamond is E colour and VS1 clarity. 

Estimate £20,000 - £30,000

MAUBOUSSIN, AN IOLITE AND MOTHER OF PEARL RING in 18ct white gold, set with a fancy oval cut iolite, accented by sections of mother of pearl, signed Mauboussin Paris and numbered, French assay marks, size K1/2 / 5.5, 18.8g. 

Estimate £1,000 - £1,500

A TANZANITE AND DIAMOND CLUSTER RING set with an oval cut tanzanite of 6.62 carats in a cluster of round brilliant cut diamonds, stamped 750, size N / 6.75, 9.0g. 

Estimate £2,000 - £3,000

A YELLOW SAPPHIRE AND DIAMOND RING set with an oval cut 6.19 carats, the openwork tapering body of scrolling design, set with round brilliant cut diamonds, engraved 6.19 0.29, stamped K18, size Q1/2 / 8.25, 9.6g. 

Estimate £2,000 - £3,000

AN UNHEATED PINK SAPPHIRE AND DIAMOND DRESS RING set with a cushion cut pink sapphire of approximately 2.58 carats accented on each side by a pear cut diamond, in a border of round brilliant cut diamonds, stamped 750, size M1/2 / 6.5, 6.5g. Accompani

Estimate £2,500 - £3,500

A 22.04 CARAT UNHEATED BLUE SPINEL AND DIAMOND RING in 18ct white gold, set with a cushion cut spinel of 22.04 carats in a border of round brilliant cut diamonds, the stylised shoulders set with further diamonds, partial British hallmarks, size N1/2

Estimate £6,000 - £8,000

A SAPPHIRE AND DIAMOND RING set with an oval cut sapphire of approximately 3.92 carats, the shoulders and gallery accented by round brilliant cut diamonds, stamped pt950, size L1/2 / 6, 8.3g. 

Estimate £3,000 - £5,000

AN ANTIQUE TURQUOISE, DIAMOND AND ENAMEL BRACELET in 15ct yellow gold, the fancy link bracelet set with three clusters comprising old cut diamonds, cabochon turquoise and white enamel, stamped 15ct, 17.5cm, 23.7g. 

Estimate £1,500 - £2,500

A 14.20 CARAT UNHEATED SPINEL RING set with an oval cut spinel of 14.20 carats, stamped 750, size N1/2 / 7, 10.9g. Accompanied by a gemmological report stating that the spinel is of Tajikistan origin and shows no indications of heat treatment. 

Estimate £10,000 - £15,000

A THREE STONE DIAMOND RING set with three round brilliant cut diamonds, the diamonds totalling 1.53 carats, inscribed 1/0.83 2/0.70, stamped 18K, size Q / 8.25, 4.5g.

Estimate £1,200 - £1,600

AN AMETHYST DRESS RING the stylised ring set with an elongated rectangular step cut amethyst, stamped 950, size M / 6.25, 63.6g. 

Estimate £3,000 - £5,000

A VINTAGE SAPPHIRE AND DIAMOND GYPSY RING in 18ct yellow gold, set with a round cut sapphire of approximately 1.02 carats, between two round brilliant cut diamonds, the band with a satin finish, stamped 18K, size L / 5.75, 8.2g.

Estimate £1,500 - £2,500

BULGARI, AN AMETHYST RING the bicolour ring set with an oval cut amethyst, signed Bvlgari, stamped 750, size L1/2 / 6, 9.0g. 

Estimate £1,000 - £1,500

A DIAMOND CLUSTER RING the diamond shaped face set with a cluster of round brilliant cut diamonds all totalling 1.2-1.3 carats, no assay marks, size adjustable from I / 4.25 to M / 6.25, 5.4g. 

Estimate £1,200 - £1,600

A CEYLON NO HEAT SAPPHIRE AND DIAMOND RING set with a cushion cut sapphire of approximately 2.50 carats, accented by rows of round brilliant and baguette cut diamonds, the diamonds totalling 0.9-1.0 carats, stamped 18K, size P / 7.75, 6.2g. Accompani

Estimate £4,000 - £6,000

DIOR, A DIAMOND DIORAMOUR RING in 18ct white gold, designed as the cursive word 'OUI' accented by a round brilliant cut diamond, signed Dior and numbered, stamped 750, size N1/2 / 7, 1.9g. 

Estimate £250 - £350

AN EMERALD AND DIAMOND RING set with a cabochon emerald of 2.45 carats, accented on each side by a baguette cut diamond, inscribed 2.45 D0.30, stamped Pt900, size J / 4.75, 5.5g. 

Estimate £1,500 - £2,500

ALEX SEPKUS, A DIAMOND FAVOURITE THINGS RING the stylised band accented by round brilliant cut diamonds, signed Alex Sepkus, stamped plat, size J / 4.75, 9.2g. 

Estimate £700 - £900

A SAPPHIRE AND DIAMOND RING set with an octagonal step cut sapphire of 2.65 carats, accented on each side by a baguette cut diamond, signed VCA NY and numbered, stamped PLAT, size M / 6.25, 3.5g. 

Estimate £1,500 - £2,500

H. STERN, A COGNAC SOLITAIRE DIAMOND RING set with a round brilliant cut cognac diamond of approximately 1.00 carat, maker's mark, stamped 750, size L1/2 / 6, 10.1g. 

Estimate £1,800 - £2,200

AN EMERALD AND DIAMOND DRESS RING set with an oval cut emerald of 5.92 carats accented by round brilliant and tapered baguette cut diamonds, stamped 750, size N / 6.75, 7.2g. 

Estimate £3,000 - £5,000