A DIAMOND AND TURQUOISE DRESS RING set with an old cut diamond of approximately 0.41 carats accented by carved turquoise and old European cut diamonds, stamped PLAT, size O1/2 / 7.5, 6.0g. 

Estimate £2,000 - £3,000

A FINE GREEN TOURMALINE AND DIAMOND DRESS RING set with an octagonal step cut green tourmaline of approximately 18.24 carats, the shoulders set with baguette and single cut diamonds, no assay marks, size M / 6.25, 8.7g. 

Estimate £4,000 - £6,000

A SAPPHIRE AND DIAMOND CLUSTER RING in 18ct yellow gold, set with an oval cut sapphire of approximately 2.80 carats in a cluster of round brilliant cut diamonds, full British hallmarks, sizing beads, size I1/2 / 4.5, 4.9g. 

Estimate £1,000 - £1,500

A SAPPHIRE AND DIAMOND DRESS RING set with a cushion cut sapphire of approximately 3.19 carats accented by old cut diamonds, no assay marks, size M / 6.25, 4.7g. 

Estimate £2,000 - £3,000

AN ANTIQUE RUBY AND DIAMOND CLUSTER RING in yellow gold and silver, the openwork design set with a central old cut diamond in a cluster of round cut rubies, accented by rose cut diamonds, no assay marks, size M / 6.5, 3.0g. 

Estimate £800 - £1,200

A WATERMELON TOURMALINE AND DIAMOND RING set with an octagonal step cut watermelon tourmaline of approximately 5.75 carats in a border of round brilliant cut diamonds, the shoulders accented by further diamonds, stamped 18K, size M / 6.25, 4.7g. 

Estimate £1,500 - £2,500

VAN CLEEF & ARPELS, A D COLOUR INTERNALLY FLAWLESS SOLITAIRE DIAMOND RING in platinum, set with a round brilliant cut diamond of 1.04 carats, signed VCA and numbered, stamped PT950, size L / 5.75, 6.0g. Accompanied by original Van Cleef & Arpels purc

Estimate £5,000 - £7,000

A FANCY DEEP BROWNISH YELLOW AND WHITE DIAMOND CLUSTER RING set with a cushion cut fancy deep brownish yellow diamond of 1.30 carats in a cluster of round brilliant cut white diamonds all totalling 1.21 carats, stamped 18K + P, size M / 6.25, 8.3g. A

Estimate £3,500 - £5,500

A PERIDOT AND DIAMOND RING set with a cushion cut peridot of approximately 6.01 carats, the shoulders accented by pave set round brilliant cut diamonds, stamped 18K, size N1/2 / 7, 4.7g. 

Estimate £1,500 - £2,500

AN UNHEATED RUBY AND DIAMOND RING set with an octagonal step cut ruby of approximately 1.33 carats, accented on each side by an emerald cut diamond, stamped 18K, size M1/2 / 6.5, 3.1g. Accompanied by a facsimile gemmological report stating the ruby s

Estimate £3,000 - £5,000

AN EMERALD AND DIAMOND CLUSTER RING set with an octagonal step cut emerald of approximately 0.79 carats in a cluster of old European cut diamonds, no assay marks, size N / 6.75, 4.4g. 

Estimate £5,000 - £7,000

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.

Estimate £10,000 - £15,000

AN ANTIQUE DIAMOND DRESS RING set with an old European cut diamond of approximately 1.02 carats in a border of old cut diamonds, the diamonds totalling 1.6-1.8 carats, no assay marks, size M1/2 / 6.5, 3.9g. 

Estimate £4,000 - £6,000

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, French maker's mark, French assay marks, size M

Estimate £10,000 - £15,000

A BURMESE RUBY AND DIAMOND DRESS RING set with a fancy cut ruby of 1.50 carats and a trillion cut diamond, the bifurcated band set with princess cut diamonds, inscribed R1.50 D1.00, stamped Pt900, size N1/2 / 7, 11.8g.

Estimate £4,000 - £6,000

A DIAMOND FULL ETERNITY RING set all around with a row of baguette cut diamonds totalling 2.7-3.0 carats, inscribed 'SJS AND LVH JULY 2, 1960', with sizing band, no assay marks, size K / 5.25, 5.5g. 

Estimate £2,000 - £3,000

A RUBY AND DIAMOND RING set with an oval cut ruby of approximately 3.07 carats between two round brilliant cut diamonds, inscribed 3.07, stamped 750, size O / 7.25, 4.1g. With a gemmological verbal assessment from GRS stating that the ruby has no ind

Estimate £6,000 - £8,000

A VINTAGE CEYLON SAPPHIRE AND DIAMOND CLUSTER RING in 18ct yellow gold, set with a cushion cut sapphire of approximately 2.49 carats in a cluster of round brilliant cut diamonds, the diamonds totalling 1.7-2.0 carats, full British hallmarks for Birmi

Estimate £3,000 - £5,000

BULGARI, AN IMPORTANT 8.53 CARAT COLOMBIAN MINOR EMERALD AND DIAMOND TROMBINO RING set with a cushion cut emerald of 8.53 carats accented on each side by baguette cut diamonds, the mount pave set throughout with round brilliant cut diamonds, the diam

Estimate £15,000 - £20,000

BULGARI, A RUBY AND DIAMOND RING in 18ct white gold, set with an oval cut ruby of 1.15 carats accented by pave set round brilliant cut diamonds, inscribed 1.15cts, signed Bulgari, Italian assay marks, stamped 750, size O1/2 / 7.5, 6.4g. 

Estimate £3,000 - £5,000

FRED PARIS, A PAIR OF GOLD STACKING RINGS in 18ct yellow and white gold, each designed as a rounded square, signed Fred Paris, French maker's mark, French assay marks, stamped 750, yellow gold band size R / 8.75, white gold band size R1/2 / 9, 13.2g.

Estimate £1,500 - £2,000

A VINTAGE DIAMOND SNAKE RING in 18ct yellow gold, designed as a coiled snake, the eyes set with two rose cut diamonds, stamped 18K, size M / 6.25, 7.7g. 

Estimate £1,000 - £1,500

A DIAMOND DRESS RING the rectangular face set with an old cut diamond of 0.70 carats, accented by rows of carre, baguette and round brilliant cut diamonds, the shoulders set with further diamonds, stamped 750, size N1/2 / 7, 9.7g. 

Estimate £2,000 - £3,000

AN EMERALD AND DIAMOND DRESS RING set with an octagonal step cut emerald of approximately 2.00 carats accented by old cut diamonds, the shoulders set with further diamonds, no assay marks, size L / 5.75, 4.4g. 

Estimate £4,000 - £6,000

CARTIER, A TURQUOISE, AMETHYST AND DIAMOND DELICES DE GOA RING in 18ct yellow gold, set with round cabochon turquoise and amethysts accented by round brilliant cut diamonds, signed Cartier and numbered, French maker's mark, French assay marks, stampe

Estimate £6,000 - £8,000

BULGARI, A PARENTESI RING the open band ring in modular design, signed Bulgari, stamped 750, size adjustable, 10.1g. 

Estimate £500 - £700

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

TIFFANY & CO., A DIAMOND FULL ETERNITY RING set all around with a row of carre cut diamonds, the diamonds all totalling 2.7-3.0 carats, signed Tiffany & Co., stamped 18K, size N / 6.75, 3.1g. 

Estimate £3,500 - £4,500

A YELLOW SAPPHIRE AND DIAMOND RING set with an oval cut yellow sapphire of 13.09 carats, the stepped shoulders set with round brilliant cut diamonds, no assay marks, size L / 5.75, 5.4g. 

Estimate £2,500 - £3,500

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 FIRE OPAL AND DIAMOND RING set with an oval cut fire opal of approximately 3.26 carats in a cluster of round brilliant cut diamonds, further diamonds set to the bifurcated band, stamped 18K, size N1/2 / 7, 6.6g. 

Estimate £2,000 - £2,500

A RUBELLITE TOURMALINE AND DIAMOND RING set with an oval cut rubellite tourmaline of approximately 35.21 carats in a border of round brilliant cut diamonds, stamped 18K, size O1/2 / 7.5, 15.3g. 

Estimate £1,500 - £2,500

AN IMPORTANT BRAZILLIAN 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 totallin

Estimate £60,000 - £80,000

A FINE 6.35 CARAT COLOMBIAN EMERALD AND DIAMOND RING set with an octagonal step cut emerald of 6.35 carats, the band set with round brilliant cut diamonds, stamped PT950, size L / 5.75, 6.2g. Accompanied by a facsimile gemmological report stating the

Estimate £15,000 - £20,000

A DIAMOND AND EMERALD TARGET RING set with a single cut diamond of 0.63 carats in a border of calibre cut emeralds, the shoulders set with further single cut diamonds, stamped 750, size M / 6.25, 5.2g. 

Estimate £1,000 - £1,500

A RUBY AND DIAMOND CLUSTER RING set with an oval cut ruby of approximately 2.82 carats in a cluster of round brilliant cut diamonds, the shoulders set with further diamonds, no assay marks, size P / 7.5, 6.2g. 

Estimate £1,500 - £2,500

A DIAMOND FULL ETERNITY RING set all around with a row of round brilliant cut diamonds, stamped 18K, size S / 9.25, 2.6g. 

Estimate £400 - £600

A SOLITAIRE DIAMOND RING set with a round brilliant cut diamond of approximately 1.70 carats accented on each side by a baguette cut diamond, stamped 14K, size H / 3.75, 4.6g. 

Estimate £3,500 - £4,500

A TANZANITE AND DIAMOND DRESS RING set with a cushion cut tanzanite of approximately 9.86 carats in a border of round brilliant cut diamonds, the diamonds totalling 2.2-2.4 carats, stamped 18K, size O / 7.25, 14.5g.

Estimate £4,000 - £6,000

A DIAMOND AND EMERALD DRESS RING set to the centre with an old cut diamond of 0.46 carats, in a concentric border of calibre cut emeralds and single cut diamonds, accented by tapered baguette and further single cut diamonds, no assay marks, size N /

Estimate £1,000 - £1,500

A FIRE OPAL AND DIAMOND CLUSTER RING set with an octagonal step cut fire opal of approximately 2.46 carats in a cluster of round brilliant cut diamonds, further round brilliant cut diamonds set to the bifurcated band, stamped 18K, size N1/2 / 7, 6.2g

Estimate £2,000 - £3,000

AN AQUAMARINE AND DIAMOND RING set with a cushion cut aquamarine of approximately 2.95 carat in a cluster of round brilliant cut diamonds, stamped 750, size P / 7.75, 5.5g. 

Estimate £800 - £1,200

AN EMERALD AND DIAMOND RING in Art Deco design, the rectangular face set with an octagonal step cut emerald of 0.88 carats, accented by borders of fancy cut emeralds, old European and single cut diamonds, the shoulders set with further emeralds and d

Estimate £2,000 - £3,000

AN IMPORTANT CEYLON NO HEAT SAPPHIRE AND DIAMOND CLUSTER RING set with a cushion cut sapphire of approximately 6.84 carats in a cluster of round brilliant and baguette cut diamonds, the diamonds totalling 1.0-1.2 carats, no assay marks, size O / 7.25

Estimate £20,000 - £25,000

A RUBY AND DIAMOND RING set with an oval cabochon ruby of approximately 1.32 carats, accented by pave set round brilliant cut diamonds, stamped 750, size K / 5.25, 7.8g. 

Estimate £800 - £1,200

A GREEN TOURMALINE AND DIAMOND RING set with an oval cut green tourmaline of approximately 7.19 carats in a border of round brilliant cut diamonds, the mount and shoulders set with further diamonds, stamped 18K, size L1/2 / 6, 6.0g. 

Estimate £1,200 - £1,600

CARTIER, A DIAMOND TRINITY RING comprising three interlocking rings set all around with a row of round brilliant cut diamonds, the diamonds totalling 1.5-1.7 carats, signed Cartier and numbered, stamped 750, size G / 3.25, 8.5g. 

Estimate £4,000 - £6,000

A FINE TYPE A JADEITE JADE AND DIAMOND BALLERINA RING set with an oval cabochon jadeite jade in a stylised border of round brilliant and tapered baguette cut diamonds, the diamonds totalling 2.83 carats, inscribed 14.03 D2.83, stamped Pt900, size L1/

Estimate £7,000 - £9,000

A RETRO RUBY AND DIAMOND DRESS RING in white gold, set with an old European cut diamond of approximately 0.60 carats in a border of carre cut diamonds and round cut rubies, accented by a row of rectangular step cut rubies, on a trifurcated band, no a

Estimate £1,000 - £1,500

A BURMA NO HEAT RUBY AND DIAMOND TOI ET MOI RING set with an oval cut ruby of 1.04 carats and a pear-shaped old cut diamond of 0.53 carats, no assay marks, size N / 6.75, 4.5g. 

Estimate £2,000 - £3,000

AN UNHEATED RUBY AND DIAMOND CLUSTER RING set with a pear cut ruby of approximately 2.05 carats in a cluster of round brilliant and baguette cut diamonds, the bifurcated band set with further round brilliant cut diamonds, inscribed R2.057 D0.93, stam

Estimate £4,000 - £6,000

OSCAR HEYMAN, A FINE UNTREATED EMERALD AND DIAMOND RING / PENDANT set with an octagonal step cut emerald of 4.71 carats in a cluster of round brilliant cut diamonds and pear cut emeralds, detachable from the ring mount to form a pendant, stamped 18K

Estimate £30,000 - £50,000

A DIAMOND DRESS RING in Art Deco design, set with three principal round brilliant cut diamonds, the stepped shoulders set with further diamonds, stamped 750, size Q / 8.25, 8.5g. 

Estimate £2,000 - £3,000

A DIAMOND AND SAPPHIRE TARGET RING set with a round brilliant cut diamond of approximately 0.90 carats in a border of French cut sapphires, the shoulders set with further sapphires, stamped 750, size M / 6.25, 4.6g. 

Estimate £1,800 - £2,200

A KUNZITE AND DIAMOND RING set with an oval cut kunzite of approximately 8.28 carats, the mount and band pave set with round brilliant cut diamonds, stamped 18K, size N1/2 / 7, 6.3g.

Estimate £1,500 - £2,500

PALOMA PICASSO FOR TIFFANY & CO., A DIAMOND SUGAR STACKS RING the domed face pave set with round brilliant cut diamonds, signed Paloma Picasso, signed Tiffany & Co., stamped AU750, size L / 5.75, 9.7g. Current retail price: £7,925. 

Estimate £2,000 - £3,000

A YELLOW SAPPHIRE AND DIAMOND HEART CLUSTER RING set with a heart cut yellow sapphire of approximately 3.72 carats in a cluster of round brilliant cut diamonds, the shoulders set with further diamonds, stamped 18K, size O / 7.25, 4.3g. 

Estimate £1,500 - £2,500

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

A MOONSTONE AND DIAMOND RING set with a cabochon moonstone accented by pave set single cut diamonds, stamped 14K, size M / 6.25, 4.8g. 

Estimate £300 - £500

AN OPAL AND DIAMOND TRIPLE CLUSTER RING set with three round cabochon opals in clusters of single cut diamonds, stamped 14K, size N1/2 / 7, 3.5g. 

Estimate £350 - £450

A 2.19 CARAT SOLITAIRE DIAMOND RING in 18ct yellow gold, set with an old European cut diamond of approximately 2.19 carats, full British hallmarks for Birmingham 1938, size L1/2 / 6, 5.0g. 

Estimate £4,000 - £6,000

A THREE STONE DIAMOND RING set with three old cut diamonds, inscribed D0.513ct D0.453ct, stamped PT950, size N / 6.75, 3.1g. 

Estimate £500 - £700

AN EMERALD AND DIAMOND THREE STONE RING set with a round cut emerald of approximately 1.47 carats, accented on each side by a round brilliant cut diamond, stamped 18K, size N1/2 / 7, 3.2g.

Estimate £1,500 - £2,500

A GARNET FULL ETERNITY RING set all around with a row of cabochon garnets totalling 4.35 carats, stamped 18K, size N / 6.75, 1.5g. 

Estimate £150 - £250

A FINE NATURAL SALTWATER PEARL AND YELLOW DIAMOND CLUSTER RING set with a pearl of 12.6mm in a double cluster of round brilliant cut yellow diamonds, the shoulders set with round brilliant cut diamonds, the yellow diamonds all totalling 2.0-2.2 carat

Estimate £15,000 - £20,000

AN EMERALD RING set with an oval cabochon emerald of 3.20 carats, stamped 18K, size M / 6.25, 1.6g. 

Estimate £350 - £550

A BURMA NO HEAT RUBY AND DIAMOND RING set with an oval cut ruby of 2.06 carats, the tapering mount set with baguette and tapered baguette cut diamonds all totalling 1.91 carats, inscribed 1.915 2.06, stamped K18WG, size N / 6.75, 5.5g. Accompanied by

Estimate £3,000 - £5,000

A DIAMOND STAR RING designed as a star set with fancy cut diamonds, the band set with round brilliant cut diamonds, the diamonds totalling 0.8-1.0 carat, no assay marks, size M1/2 / 6.5, 2.8g. 

Estimate £1,000 - £1,500

A DIAMOND RING in 18ct white gold, set with a round brilliant cut diamond of approximately 0.46 carats, the band accented by tapered baguette and round brilliant cut diamonds, full British hallmarks, size M / 6.25, 5.9g. 

Estimate £800 - £1,200

A TYPE A JADEITE JADE AND DIAMOND RING set with an oval cabochon jadeite jade of 7.33 carats, the shoulders set with round brilliant and tapered baguette cut diamonds, inscribed 7.33 D0.40, stamped Pt900, size P / 7.75, 9.9g. Accompanied by a facsimi

Estimate £3,000 - £5,000

AN EMERALD AND DIAMOND RING set with an octagonal step cut emerald in a double cluster of round brilliant cut diamonds, no assay marks, size P1/2 / 8, 7.7g. 

Estimate £400 - £600

A COLLECTION OF DIAMOND RINGS comprising a diamond cluster ring inscribed 0.505, stamped 375, size M1/2 / 6.5, 4.0g, a solitaire diamond ring in 9ct yellow gold, inscribed 0.20CT, partial British hallmarks, size N1/2 / 7, a diamond cluster ring in 9c

Estimate £250 - £350

NO RESERVE - A DIAMOND LILY OF THE VALLEY RING in 9ct white gold, comprising two lily of the valley flowers set with round brilliant cut diamonds, partial British hallmarks, size M1/2 / 6.5, 2.1g. 

Estimate £100 - £200

NO RESERVE - A SAPPHIRE RING the domed ring set with articulated rows of round cut sapphires, no assay marks, size O / 7.25, 8.6g. 

Estimate £250 - £350

GUCCI, AN ICON RING in 18ct white gold, the band comprising GG motifs and star decoration, signed Gucci, Italian assay marks, size L / 5.75, 3.9g. 

Estimate £300 - £500