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 £6,000 - £8,000

SCHLUMBERGER STUDIOS FOR TIFFANY & CO., A SIXTEEN STONE DIAMOND RING comprising a row of round brilliant cut diamonds accented by X motifs, the diamonds totalling 1.14 carats, signed Tiffany & Co., signed Schlumberger studios, stamped 750 PT950, size

Estimate £3,000 - £5,000

A SOLITAIRE DIAMOND RING set with an emerald cut diamond of approximately 3.42 carats between two baguette cut diamonds, stamped PLAT, size L1/2 / 6, 4.5g. 

Estimate £8,000 - £12,000

A TWO ROW DIAMOND HALF ETERNITY RING set with two rows of round brilliant cut diamonds all totalling 1.6-1.8 carats, no assay marks, size M / 6.25, 6.1g. 

Estimate £800 - £1,200

A FINE PARAIBA TOURMALINE AND DIAMOND RING in 18ct white gold, set with a pear cut tourmaline of 5.38 carats in a border of round brilliant cut diamonds, the diamonds totalling 1.5-1.6 carats, full British hallmarks, size M1/2 / 6.5, 9.9g. Accompanie

Estimate £10,000 - £15,000

A SAPPHIRE AND DIAMOND CLUSTER RING set with an octagonal step cut sapphire of approximately 6.21 carats in a cluster of round brilliant and baguette cut diamonds, further round brilliant cut diamonds set to the band, the diamonds totalling 1.3-1.5 c

Estimate £4,000 - £6,000

MIKIMOTO, A DIAMOND HEART RING designed as three open hearts set with round brilliant cut diamonds, inscribed 0.57, signed MII, stamped K18WG, size K / 5.25, 4.7g. 

Estimate £600 - £800

A PURPLISH RED TOURMALINE AND DIAMOND CLUSTER RING set with an oval cut tourmaline of 8.11 carats in a triple cluster of round brilliant cut diamonds, the diamonds totalling 4.4-4.6 carats, stamped 750, size N1/2 / 7, 13.3g. Accompanied by a gemmolog

Estimate £4,000 - £6,000

CARTIER, A LES MUST DE CARTIER TRINITY RING comprising three interlocking tricolour rings, signed le must de Cartier, stamped 750, size K1/2 / 5.5, 7.3g. 

Estimate £400 - £600

AN AQUAMARINE AND DIAMOND CLUSTER RING in 18ct white gold, set with an oval cut aquamarine of approximately 22.00 carats in a cluster of round brilliant cut diamonds, further round brilliant cut diamonds set to the shoulders, the diamonds totalling 2

Estimate £3,500 - £4,500

CHOPARD, DIAMOND HAPPY DIAMONDS SUN RING designed as a rising sun set with round brilliant cut diamonds, with a free moving round brilliant cut diamond in a white sapphire locket, signed Chopard and numbered, stamped 750, size K1/2 / 5.5, 9.5g. 

Estimate £1,500 - £2,500

AN INDIAN DIAMOND AND ENAMEL RING set with a flat cut diamond in a border of red and white enamel, accented by further rose cut diamonds, no assay marks, size M / 6.25, 6.8g. 

Estimate £120 - £160

CARTIER, A DIAMOND NOUVELLE VAGUE RING in 18ct white gold, designed as two interlocking bands, one set with round brilliant cut diamonds, the diamonds totalling 1.0-1.1 carats, signed Cartier and numbered, Swiss assay marks, size H1/2 / 4, 11.6g.

Estimate £1,800 - £2,200

NO RESERVE - A TURQUOISE CLUSTER RING set with an oval cabochon turquoise in a cluster of round cabochon turquoise, no assay marks, size S / 9.25, 4.9g. 

Estimate £200 - £300

AN ART DECO JADEITE JADE, CORAL AND DIAMOND DRESS RING in 18ct white gold, set with a polished jadeite jade, accented by polished coral and single cut diamonds, later shank with partial British hallmarks, size K / 5.25, 5.8g. 

Estimate £4,000 - £6,000

TIFFANY & CO., A PEARL RING set with a pearl of 7.3mm, signed Tiffany & Co., stamped 750, size N1/2 / 7, 6.5g. 

Estimate £600 - £800

A BURMA NO HEAT SPINEL AND DIAMOND RING set with a cushion cut spinel of 3.29 carats in a border of round brilliant cut diamonds, stamped 18K, size M / 6.25, 3.8g. Accompanied by a gemmological report stating that the spinel is of Burmese (Myanmar) o

Estimate £4,500 - £5,500

A TIGER'S EYE AND DIAMOND DRESS RING the stylised ring set with three polished tiger's eyes, accented by rows of round brilliant cut diamonds, stamped K18, size P / 7.75, 10.6g. 

Estimate £600 - £800

A DIAMOND DRESS RING the tapering hammered gold band accented by rows of intersecting round brilliant cut diamonds, inscribed D0.30, stamped K18, size L1/2 / 6, 9.7g. 

Estimate £600 - £800

TIFFANY & CO., A PEARL RING set with a pearl of 7.3mm, signed Tiffany & Co., stamped 750, size J / 4.75, 6.2g. 

Estimate £300 - £500

A FRENCH OPAL, DIAMOND AND PLIQUE A JOUR ENAMEL DRAGONFLY RING in 18ct yellow gold, the ring designed as a pair of dragonflies set with two marquise cabochon opals, the wings decorated with green plique a jour enamel, the eyes set with round brillian

Estimate £6,000 - £8,000

NO RESERVE - AN AMETHYST AND WHITE GEMSTONE RING in 9ct yellow gold, set with three oval cut amethysts, accented by round cut white gemstones, full British hallmarks, size R / 8.5, 4.0g. 

Estimate £150 - £250

AN ANTIQUE BELLE EPOQUE DIAMOND AND PEARL TOI ET MOI RING set with an old European cut diamond of approximately 0.77 carats and a pearl of 5.7mm, accented by further old European cut diamonds, no assay marks, size Q / 8.25, 4.6g.

Estimate £2,000 - £3,000

VAN CLEEF & ARPELS, A DIAMOND PERLEE RING pave set with round brilliant cut diamonds, accented by rows of gold beads, signed VCA and numbered, stamped AU750, size K1/2 / 5.5, 9.0g. Accompanied by a Van Cleef & Arpels jewellery pouch. 

Estimate £5,000 - £7,000

A PINK OPAL AND DIAMOND RING the stylised ring set with sections of polished pink opal, accented by round brilliant cut diamonds, stamped K18, size L / 5.75, 6.9g. 

Estimate £800 - £1,200

A DIAMOND RING set with a central pear shape rose cut diamond, surrounded by a cluster of round cut diamonds, stamped 14K, size N / 6.75, 2.8g. 

Estimate £500 - £700

CARTIER, A DIAMOND DRESS RING in 18ct yellow gold, the wide band half set with pave set round brilliant cut diamonds, the diamonds totalling 1.8-2.0 carats, signed Cartier and numbered, Swiss assay marks, stamped 750, size M / 6.25, 12.1g. 

Estimate £4,000 - £6,000

A DIAMOND RING set with a polki cut diamond, no assay marks, size N / 6.75, 1.4g. 

Estimate £80 - £120

STEPHEN WEBSTER, A ROCK CRYSTAL, DIAMOND AND PINK HARDSTONE CRYSTAL HAZE RING in 18ct white gold, set with a faceted rock crystal over a pink hardstone, in a border of round brilliant cut diamonds, Stephen Webster maker's mark, full British hallmarks

Estimate £1,000 - £1,500

NO RESERVE - AN ANTIQUE DIAMOND FIVE STONE RING in 18ct yellow gold, set with five old cut diamonds, stamped 18ct, size N1/2 / 7, 1.8g. 

Estimate £300 - £500

A TURQUOISE AND DIAMOND DRESS RING set with a polished rectangular turquoise within a frame of rose cut diamonds, the band set all around with further rose cut diamonds, no assay marks, size M1/2 / 6.5, 15.9g. 

Estimate £300 - £500

WENDY YUE, A JADEITE JADE, TSAVORITE GARNET AND DIAMOND FLOWER RING in 18ct white gold, set with jadeite jade petals and round cut tsavorite garnets, accented by round brilliant cut diamonds, maker's mark, full British hallmarks, stamped 750, size N1

Estimate £3,500 - £4,500

A LARGE BAROQUE PEARL AND DIAMOND DRESS RING in 18ct yellow gold, set with a baroque pearl of 29.0mm accented by ropework, the shoulders set with round brilliant cut diamonds, the bifurcated band in ropework design, inscribed d0.066ct, partial Britis

Estimate £1,200 - £1,600

AN ENAMEL AND DIAMOND RING the turquoise enamel band set with round brilliant cut diamonds, stamped 18K, size N / 6.75, 3.2g. 

Estimate £500 - £700

A TANZANITE AND DIAMOND RING set with an oval cut tanzanite, accented on each side by three graduating round brilliant cut diamonds, stamped 585, size N1/2 / 7, 2.5g. 

Estimate £400 - £600

VAN CLEEF & ARPELS, A MALACHITE AND DIAMOND ALHAMBRA RING in 18ct yellow gold, comprising a polished malachite quatrefoil set with a round brilliant cut diamond, signed VCA and numbered, French assay marks, stamped Au750, size K / 5.25, 6.2g. Accompa

Estimate £1,800 - £2,200

A GOLDEN MOTHER OF PEARL, DIAMOND AND RUBY BUTTERFLY RING the wings set with golden mother of pearl and accented by round brilliant cut diamonds, the antennae set with round cut rubies, stamped K18, size N1/2 / 7, 7.9g. 

Estimate £800 - £1,200

NO RESERVE - A TURQUOISE CLUSTER RING set with an oval cabochon turquoise in a double cluster of round cabochon turquoise, no assay marks, size O1/2 / 7.5, 5.5g. 

Estimate £200 - £300

MAUBOUSSIN, AN AMETHYST RING in 18ct white gold, set with an oval cut amethyst, signed Mauboussin Paris and numbered, French assay marks, stamped 750, size P1/2 / 8, 11.5g. 

Estimate £1,000 - £1,500

A PEARL AND DIAMOND TOI ET MOI RING set with a black pearl of 9.8mm and a white pearl of 9.4mm, the band set with round brilliant cut diamonds, no assay marks, size I / 4.25, 8.2g. 

Estimate £500 - £700

A DIAMOND HALF ETERNITY RING half set with a row of round brilliant cut diamonds, the diamonds totalling 1.3-1.4 carats, stamped 18CT, size P / 7.75, 5.1g. 

Estimate £600 - £800

BULGARI, A BLUE TOPAZ B.ZERO1 RING in 18ct white gold, the band set with three rows of round cut blue topaz, with engraved lettering 'BVLGARI' to the sides, signed Bulgari, Italian assay marks, stamped 750, size J / 4.75, 13.5g.

Estimate £800 - £1,200

A VINTAGE NATURAL ORANGE JADEITE JADE AND DIAMOND RING, 1970S in 14ct yellow gold, set with an oval cabochon jadeite jade, the hammered mount accented by round cut diamonds, stamped 14K 585, size M / 6.25, 20.0g. Accompanied by a GIA report from 1978

Estimate £1,200 - £1,600

A DIAMOND RING set with a polki cut diamond, no assay marks, size N1/2 / 7, 1.3g. 

Estimate £80 - £120

MIKIMOTO, A SAPPHIRE AND DIAMOND RING set with four round cut sapphires, the shoulders set with round brilliant cut diamonds, inscribed 0.74ct 0.32ct, Mikimoto maker's mark, stamped K18, size K1/2 / 5.5, 5.2g. 

Estimate £500 - £700

A 4.89 CARAT ZAMBIAN EMERALD AND DIAMOND RING set with an octagonal step cut emerald of 4.89 carats, accented on each side by a trapezoid cut diamond, no assay marks, size L / 5.75, 5.0g. With a gemmological verbal assessment stating that the emerald

Estimate £10,000 - £15,000

LACLOCHE, AN ART DECO EMERALD AND DIAMOND RING set with a cushion cut emerald of approximately 0.80 carats, the shoulders set with round and fancy cut diamonds, signed Lacloche Freres, no assay marks, size I / 4.25, 2.4g. 

Estimate £5,000 - £7,000

NO RESERVE - AN ANTIQUE OPAL FIVE STONE RING in 18ct yellow gold, set with five oval cabochon opals, accented by rose cut diamonds, stamped 18ct, size Q / 8, 3.6g. 

Estimate £200 - £300

ELSA PERETTI FOR TIFFANY & CO., AN OPEN HEART RING designed as an open heart, signed Tiffany & Co., signed Peretti Spain, stamped AU750, size I1/2 / 4.5, 3.6g. 

Estimate £400 - £600

A SAPPHIRE FIVE STONE RING set with a row of five cushion cut sapphires, no assay marks, size T / 9.75, 5.6g. With a gemmological verbal assessment stating that the sapphires are of Ceylon (Sri Lankan) origin. 

Estimate £2,000 - £3,000

A COGNAC DIAMOND FLOWER RING / BROOCH / PENDANT the petals pave set with round cut cognac diamonds, detachable from the ring mount to be worn as a brooch or pendant, stamped 750, ring size N1/2 / 7, 3.5cm, 25.4g. 

Estimate £1,000 - £1,500

NO RESERVE - A TOPAZ AND DIAMOND RING set with a pear cut topaz, accented by round brilliant cut diamonds, stamped AU585, size M / 6.25, 3.5g. 

Estimate £200 - £300

TIFFANY & CO., AN INFINITY RING designed as the infinity motif, signed Tiffany & Co. stamped AU750, size J / 4.75, 4.3g. 

Estimate £300 - £500

MIKIMOTO, A SAPPHIRE AND DIAMOND RING set with round cut sapphires accented by round brilliant cut diamonds, Mikimoto maker's mark, stamped K18, size J / 4.75, 5.9g. 

Estimate £500 - £700

FRANK GEHRY FOR TIFFANY & CO., A DIAMOND TORQUE RING the square ring pave set with round cut diamonds, signed T & Co., signed Gehry, stamped 750, size L / 5.75, 5.1g. 

Estimate £600 - £800

A RUBELLITE TOURMALINE AND DIAMOND RING set with a facetted rubellite tourmaline of approximately 20.00 carats in a border of round brilliant cut diamonds, stamped 750, size O / 7.25, 20.5g. 

Estimate £8,000 - £12,000

A FIRE OPAL AND ORANGE SAPPHIRE DRESS RING set with a square step cut fire opal, the mount accented by round cut orange sapphires, stamped 14K, size R1/2 / 8.75, 40.4g. 

Estimate £4,000 - £6,000

ELSA PERETTI FOR TIFFANY & CO., A DIAMOND OPEN HEART RING designed as an open heart set with round brilliant cut diamonds, signed Tiffany & Co., signed Peretti Spain, stamped Pt.950, size I1/2 / 4.5, 5.4g. 

Estimate £350 - £550

A DIAMOND FLOWER RING set with a round brilliant cut diamond of approximately 0.46 carats in a border of tapered baguette cut diamonds, no assay marks, size I / 4.25, 7.7g. 

Estimate £800 - £1,200

A SAPPHIRE AND DIAMOND RING set with an oval cut sapphire of approximately 1.12 carats, the shoulders set with princess cut diamonds, inscribed 1.12 D0.025, stamped Pt900, size K / 5.25, 5.6g. 

Estimate £400 - £600

A COLOMBIAN EMERALD AND DIAMOND RING set with an octagonal step cut emerald of 1.00 carat in a border of round brilliant cut diamonds, the band set with further diamonds, no assay marks, size N / 6.75, 4.0g. 

Estimate £1,500 - £2,500

A RUBY AND DIAMOND CLUSTER RING set with an oval cut ruby of 0.65 carats in a cluster of round brilliant cut diamonds all totalling 0.60 carats, inscribed 0.65 D0.60, stamped PT900, size K / 5.25, 5.8g. 

Estimate £800 - £1,200

A RUBY AND DIAMOND CLUSTER RING set with an oval cut ruby of approximately 2.67 carats in a cluster of round brilliant cut diamonds, further round brilliant cut diamonds set to the bifurcated band, the diamonds totalling 1.3-1.4 carats, stamped 750,

Estimate £3,000 - £5,000

NO RESERVE - AN OPAL AND DIAMOND RING set with an oval cabochon opal, accented on each side by three graduating round brilliant cut diamonds, stamped 585, size O / 7.25, 3.4g. 

Estimate £300 - £500

NO RESERVE - A STAR SAPPHIRE AND DIAMOND RING set with an oval cabochon star sapphire, accented on each side by a round cut diamond, no assay marks, size  R / 8.75, 3.7g. 

Estimate £150 - £250

AN INDIAN DIAMOND AND ENAMEL RING set with a flat cut diamond in a border of red and white enamel, accented by further rose cut diamonds, no assay marks, size N / 6.75, 7.3g. 

Estimate £120 - £160

AN ANTIQUE CARNELIAN RING in 18ct yellow gold, set with an oval polished carnelian, on a quinfurcated band, French import marks, size I / 4.25, 13.4g. 

Estimate £800 - £1,200

NO RESERVE - A DIAMOND FLOWER RING in 9ct white gold, designed as two flower heads set with round brilliant cut diamonds, inscribed d0.105ct, partial British hallmarks, stamped Au375, size O / 7.25, 2.0g.

Estimate £100 - £150

A DIAMOND HALF ETERNITY RING set with a row of baguette cut diamonds between rows of round brilliant cut diamonds, the diamonds all totalling 2.45 carats, stamped 750, size N / 6.75, 5.7g. 

Estimate £2,000 - £3,000

NO RESERVE - A SAPPHIRE AND DIAMOND RING set with an oval cut sapphire, the band set with pairs of single cut diamonds, stamped 585, size M1/2 / 6.5, 3.7g. 

Estimate £120 - £180

NO RESERVE - A BLUE TOPAZ RING in 9ct yellow gold, set with four oval cut blue topaz, full British hallmarks, size P / 7.5, 2.5g. 

Estimate £100 - £150

A RUBY AND DIAMOND CLUSTER RING in 18ct white gold, set with an oval cut ruby of 1.56 carats in a cluster of round brilliant cut diamonds, further round brilliant cut diamonds set to the shoulders, the diamonds totalling 0.6-0.7 carats, full British

Estimate £1,500 - £2,500

NO RESERVE - TWO DIAMOND RINGS comprising a solitaire diamond ring set with a round brilliant cut diamond, stamped 18CT PLAT, size L / 5.75, 2.6g, a diamond ring set with single cut diamonds, stamped 18CT, size N1/2 / 7, 2.0g. 

Estimate £200 - £300

A RUBY RING set with a cabochon ruby carved to depict a leaf, no assay marks, size L1/2 / 6, 1.1g. 

Estimate £80 - £120

A PINK SAPPHIRE AND DIAMOND RING set with an oval cut pink sapphire of 0.86 carats in a cluster of round brilliant cut diamonds, each shoulder set with a tapered baguette cut diamond, the diamonds all totalling 0.50 carats, inscribed 0.86 D0.50, stam

Estimate £800 - £1,200

A DIAMOND RING set with a 1.59 carat fancy cut diamond, surrounded by a cluster of round cut diamonds, stamped 14K, size N / 6.75, 2.6g. 

Estimate £400 - £600

A RUBY AND DIAMOND THREE STONE RING set with an oval cut ruby of approximately 0.55 carats, accented on each side by a round cut diamond, stamped 18CT PLAT, size K / 5.25, 3.0g. 

Estimate £300 - £500