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 £4,000 - £6,000

ATTR CHARLES DE TEMPLE, A VINTAGE DIAMOND RING in 18ct yellow gold, in a stylised crossover design set with a cluster of pave set round brilliant cut diamonds, accented by further round brilliant cut diamonds, apparently unsigned, no assay marks, siz

Estimate £1,500 - £2,500

A 3.84 CARAT SOLITAIRE DIAMOND ENGAGEMENT RING in platinum, set with an old cut diamond of 3.84 carats in a halo of round brilliant cut diamonds, the band set with further diamonds, partial British hallmarks, size M / 6.25, 9.8g. 

Estimate £18,000 - £22,000

A RETRO GREEN TOURMALINE AND DIAMOND RING in yellow and white gold, set with two octagonal step cut green tourmalines totalling approximately 13.00 carats, accented by trios of single cut diamonds, no assay marks, size L1/2 / 6, 13.6g. 

Estimate £1,200 - £1,600

A FINE BLACK OPAL AND DIAMOND DRESS RING in platinum and yellow gold, set with a cabochon black opal in a stylised border of round brilliant cut diamonds, the shoulders set with further round brilliant cut diamonds, no assay marks, size M / 6.25, 9.0

Estimate £8,000 - £12,000

AN ANTIQUE ART DECO SOLITAIRE DIAMOND RING in platinum, set with an old cut diamond of 2.11 carats flanked by trios of baguette cut diamonds, no assay marks, size R / 8.5, 4.7g. 

Estimate £10,000 - £15,000

A STAR SAPPHIRE AND DIAMOND DRESS RING in platinum, set with an oval cabochon star sapphire of approximately 10.00 carats, in a stylised border of round brilliant, single and old cut diamonds all totalling 4.0-4.5 carats, no assay marks, size L / 5.7

Estimate £6,000 - £8,000

AN ANTIQUE FRENCH EMERALD AND DIAMOND RING in 18ct rose gold, set with an old cut diamond of approximately 0.70 carats and an octagonal step cut emerald of approximately 0.60 carats, on a bifurcated band set with rose cut diamonds, French assay marks

Estimate £2,000 - £3,000

AN ART DECO DIAMOND RING, CIRCA 1920 in platinum, set with an old European cut diamond of approximately 1.10 carats in a fine pierced mount set with single cut diamonds, no assay marks, size J1/2 / 5, 3.1g. 

Estimate £2,000 - £3,000

A SAPPHIRE AND DIAMOND GYSPY RING in 18ct yellow gold, set with a cabochon sapphire between two heart brilliant cut diamonds, no assay marks, size M / 6.25, 8.0g. 

Estimate £1,200 - £1,800

J.E. CALDWELL, AN ANTIQUE EMERALD AND DIAMOND RING in yellow gold, set with a rectangular step cut emerald of approximately 1.0 carats, accented by old cut diamonds, signed JEC & CO, no assay marks, size G / 3.25, 2.8g. 

Estimate £2,000 - £3,000

A BURMESE RUBY AND DIAMOND CLUSTER RING in 18ct yellow gold, set with an oval cut ruby of 10.35 carats in a cluster of round brilliant cut diamonds, the diamonds all totalling 2.0-2.5 carats, stamped 18K, size N / 6.75, 9.3g. 

Estimate £15,000 - £20,000

MAUBOUSSIN, A FIRE OPAL RING in 18ct yellow and white gold, the ridged band set with a round cabochon fire opal, signed Mauboussin and numbered, stamped 18KT, size I / 4.25, 12.5g. 

Estimate £1,500 - £2,500

POMELLATO, A BLUE TOPAZ AND DIAMOND RING in 18ct yellow gold, set with two rows of rose cut blue topaz, accented by round brilliant cut diamonds, signed Pomellato, stamped 750, size M1/2 / 6.5, 16.5g. 

Estimate £5,000 - £7,000

BULGARI, A BURMA NO HEAT RUBY AND DIAMOND RING in platinum and 18ct yellow gold, set with a cushion cut ruby of 2.03 carats between two round brilliant cut diamonds, the shoulders set with tapered baguette diamonds, the diamonds all totalling 1.3-1.5

Estimate £15,000 - £25,000

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 £1,500 - £2,500

POMELLATO, AN AMBER AND DIAMOND RING in 18ct rose gold, set with an oval cabochon amber in a border of round brilliant cut diamonds, the diamonds all totalling 1.44 carats, signed Pomellato, stamped 750, size K1/2 / 5.5, 22.9g. 

Estimate £2,000 - £3,000

A 7.60 CARAT DIAMOND SOLITAIRE RING in 18ct white gold, set with an old European cut diamond of 7.60 carats, French assay marks, size I / 4.25, 5.6g. Accompanied by a gemmological report from the GIA stating that the diamond is L colour, VS2 clarity.

Estimate £65,000 - £75,000

BULGARI, A MOTHER OF PEARL AND DIAMOND DIVA'S DREAM RING in 18ct rose gold, set with polished mother of pearl and round brilliant cut diamonds, signed Bulgari, stamped 750, size M / 6.25, 10.3g. 

Estimate £3,500 - £4,500

A DIAMOND CLUSTER RING in 18ct yellow gold, set with an old marquise cut diamond of approximately 2.40 carats in a cluster of round brilliant cut diamonds, stamped 18CT, size N1/2 / 7, 5.6g. 

Estimate £7,000 - £9,000

J.E CALDWELL, AN AQUAMARINE AND DIAMOND RING in 18ct yellow gold, set with an octagonal step cut aquamarine of approximately 8.97 carats, accented by round brilliant cut diamonds, signed JEC CO, no assay marks, size H1/2 / 4, 5.4g. 

Estimate £3,000 - £5,000

A RETRO FRENCH CITRINE TANK RING in 18ct yellow gold, set with an octagonal step cut citrine of approximately 9.12 carats, French assay marks, size N1/2 / 7, 18.2g. 

Estimate £3,000 - £5,000

A FRENCH AMETHYST, CORAL AND DIAMOND RING in 18ct yellow gold, set with a polished amethyst bead, accented on each side by a trio of round brilliant cut diamonds, the band set with polished coral, stamped 18K, size J / 4.75, 8.7g. 

Estimate £1,200 - £1,600

VAN CLEEF & ARPELS, A DIAMOND LOTUS BETWEEN THE FINGER RING in 18ct white gold, the articulated double ring comprising a lotus flower and two leaves pave set throughout with round brilliant cut diamonds, the diamonds all totalling 2.14 carats, signed

Estimate £15,000 - £25,000

A PINK DIAMOND DRESS RING in 18ct white gold, the wide band set with various cut pink diamonds all totalling 3.4-3.8 carats, no assay marks, size M / 6.25, 24.4g. 

Estimate £4,000 - £6,000

A 4.35 CARAT DIAMOND SOLITAIRE RING in platinum, set with an old cushion cut diamond of 4.35 carats, signed VCA and numbered, indistinct French marks, adjustable sizing from J / 4.75 to M / 6.25, 5.7g. 

Estimate £35,000 - £45,000

A VINTAGE COLOMBIAN EMERALD AND DIAMOND DRESS RING, 1940S in platinum, the bombe face set with an oval cabochon emerald accented on each side by an old cut diamond, set with further single and rose cut diamonds, Portuguese assay marks, size N1/2 / 7,

Estimate £6,000 - £8,000

POMELLATO, AN AMETHYST AND DIAMOND RING in 18ct yellow gold, set with two rows of rose cut amethysts, accented by round brilliant cut diamonds, signed Pomellato, stamped 750, size J / 4.75, 16.4g. 

Estimate £3,000 - £5,000

J.E. CALDWELL, AN ART DECO UNHEATED SAPPHIRE AND DIAMOND RING in platinum, set with a sugarloaf cabochon sapphire, accented by single cut diamonds, signed J.E.C & CO., no assay marks, size H1/2 / 4, 3.2g. Accompanied by a facsimile gemmological repor

Estimate £2,000 - £3,000

A 2.12 CARAT SOLITAIRE DIAMOND RING in platinum, set with a novelty cut diamond of 2.12 carats flanked by trios of baguette cut diamonds, HDK maker's mark, full British hallmarks, size L1/2 / 6, 5.5g. Accompanied by a facsimile gemmological report fr

Estimate £8,000 - £12,000

A DIAMOND FULL ETERNITY RING in platinum, set all around with a row of baguette cut diamonds all totalling 6.5-7.0 carats, stamped PLAT, size L1/2 / 6, 10.1g. 

Estimate £15,000 - £20,000

FAVERO, A GREEN TOURMALINE, CITRINE AND DIAMOND FLOWER RING in 18ct yellow gold, set with oval and round cut green tourmalines and citrines, accented by round brilliant cut diamonds, unsigned, Italian assay marks, stamped 750, size N / 6.75, 21.9g. 

Estimate £2,500 - £3,500

A BURMA NO HEAT RUBY AND DIAMOND CLUSTER RING in 18ct white and yellow gold, set with an oval cut ruby of 4.58 carats in a cluster of oval rose cut diamonds and round cut rubies, the band set with round brilliant cut diamonds, the diamonds all totall

Estimate £45,000 - £55,000

A PAIR OF EMERALD AND DIAMOND DROP EARRINGS in platinum, each set with three cushion cut emeralds accented by baguette cut diamonds, suspending a further cushion cut emerald in a border of round brilliant cut diamonds, the emeralds all totalling 28.4

Estimate £60,000 - £80,000

A 6.50 CARAT SOLITAIRE DIAMOND RING in 18ct white gold, set with a radiant cut diamond of 6.50 carats, full British hallmarks, size N1/2/ 7, 6.2g.

Estimate £20,000 - £30,000

TIFFANY & CO., A DIAMOND ETERNITY RING in platinum, set all around with a row of radiant cut diamonds, the diamonds all totalling 1.37 carats, signed Tiffany & Co., stamped PT950, size M / 6.25, 4.9g. 

Estimate £2,500 - £3,500

A 5.76 CARAT SOLITAIRE DIAMOND RING in 18ct white gold, set with an oval cut diamond of 5.76 carats, the mount set throughout with round brilliant cut diamonds all totalling 1.5-2.0 carats, no assay marks, size N1/2 / 7, 11.0g.

Estimate £25,000 - £35,000

SOLANGE AZAGURY-PARTRIDGE, A DIAMOND SMARTIE POISON RING in 18ct yellow gold, comprising a circular hinged locket compartment pave set throughout with round brilliant cut diamonds, on a band pave set with further diamonds, SAP maker's mark, full Brit

Estimate £6,000 - £8,000

A PINK AND WHITE DIAMOND CROSSOVER RING in platinum, the open band set with a pear cut pink diamond of approximately 0.77 carats and a marquise cut diamond of approximately 0.80 carats, full British hallmarks, size M / 6.25, 14.4g. 

Estimate £1,500 - £2,500

A DIAMOND CLUSTER RING in 18ct yellow gold, set with a cluster of old cut diamonds all totalling 4.0-5.0 carats, no assay marks, size P / 7.75, 14.5g.

Estimate £4,000 - £6,000

A BURMA NO HEAT RUBY AND DIAMOND RING in 18ct white gold, set with an oval cut ruby of 1.91 carats, accented by rows of baguette cut diamonds, the diamonds all totalling 2.06 carats, inscribed 1.915 2.06, stamped K18WG, size N / 6.75, 5.6g. Accompani

Estimate £4,000 - £6,000

A CITRINE AND DIAMOND RING in yellow gold, set with an oval cut citrine in an ornate mount accented by single cut diamonds, no assay marks, size L / 5.75, 5.8g. 

Estimate £400 - £600

A BURMA NO HEAT RUBY AND DIAMOND CLUSTER RING in platinum, set with a cabochon ruby of approximately 6.50 carats in a border of baguette and single cut diamonds, no assay marks, size J / 4.75, 6.5g. Accompanied by a gemmological report stating that t

Estimate £10,000 - £15,000

A SAPPHIRE AND DIAMOND CLUSTER RING in platinum and yellow gold, set with a cushion cut sapphire of 8.04 carats in a cluster of oval and pear cut diamonds all totalling 2.0-2.2 carats, stamped PLAT, size K1/2 / 5.5, 11.0g.

Estimate £20,000 - £30,000