AN ANTIQUE EDWARDIAN SAPPHIRE AND DIAMOND RING set with a cushion cut sapphire of approximately 2.00 carats, the pierced openwork gallery accented by single cut diamonds, no assay marks, size J / 4.75, 4.7g. 

Estimate £1,500 - £2,500

CARTIER, A GOLD ECROU DE CARTIER RING in 18ct yellow gold, the ridged band with five nut motifs, signed Cartier and numbered, stamped Au 750, Cartier size 52, size L1/2 / 6, 7.9g. Accompanied by a Cartier certificate of authenticity and jewellery box

Estimate £1,500 - £2,500

MAUBOUSSIN, A DIAMOND AND ENAMEL DRESS RING in 18ct yellow gold, set with round brilliant cut diamonds, accented by segments of green, blue and white enamel, signed Mauboussin Paris and numbered, French maker's mark, French assay marks, stamped 18KTS

Estimate £1,800 - £2,200

A 2.09 CARAT COLOMBIAN EMERALD AND DIAMOND CLUSTER RING set with an octagonal step cut emerald of 2.09 carats in a cluster of old cut diamonds, the shoulders set with further old cut diamonds, the diamonds totalling 3.8-4.2 carats, no assay marks, si

Estimate £10,000 - £15,000

BOODLES, A RARE AND EXCEPTIONAL 4.13 CARAT PINK DIAMOND RING in platinum, set with a pear mixed cut fancy orangy pink diamond of 4.13 carats in a double halo of round brilliant cut diamonds, the accenting diamonds all totalling 0.80 carats, signed Bo

Estimate £400,000 - £600,000

A FINE BURMA NO HEAT RUBY AND DIAMOND THREE STONE RING in 18ct white gold, set with a cushion cut ruby of 4.67 carats between two transitional cut diamonds weighing 1.02 and 0.94 carats, full British hallmarks for Birmingham 1975, size O / 7.25, 4.8g

Estimate £40,000 - £60,000

A VERY FINE BLACK OPAL AND DIAMOND DRESS RING set with a polished rounded triangular shaped black opal of approximately 4.87 carats, displaying bright flashes of red, blue, green, yellow and violet, accented by single cut diamonds to the bifurcated s

Estimate £8,000 - £12,000

AN ART DECO CEYLON SAPPHIRE AND DIAMOND RING set with a cushion cut sapphire of approximately 6.00 carats, the gallery and shoulders set with single cut diamonds, no assay marks, size L1/2 / 6, 4.7g. Accompanied by a facsimile gemmological report sta

Estimate £12,000 - £16,000

KUTCHINSKY, A YELLOW SAPPHIRE AND DIAMOND DRESS RING comprising a central section invisibly set with square step cut yellow sapphires, accented by segments pave set with round brilliant cut diamonds, the diamonds all totalling 1.2-1.4 carats, signed

Estimate £1,800 - £2,200

A 36.83 CARAT BURMA NO HEAT SAPPHIRE AND DIAMOND RING set with a cushion cut sapphire of 36.83 carats, accented by pairs of baguette cut diamonds, no assay marks, size N1/2 / 7, 12.8g. Accompanied by a facsimile gemmological report stating the sapphi

Estimate £50,000 - £70,000

AN ANTIQUE DIAMOND CLUSTER RING in yellow gold and silver, set with a rose cut diamond of approximately 7.3mm x 7.4mm, within a cluster of further rose cut diamonds, no assay marks, size N / 6.75, 4.5g. 

Estimate £3,000 - £5,000

A FINE SAPPHIRE AND DIAMOND THREE STONE RING in platinum, set with an octagonal step cut sapphire of approximately 3.29 carats, accented on each side by an old cut diamond, the diamonds totalling 1.4-1.6 carats, partial British hallmarks, size N1/2 /

Estimate £6,000 - £8,000

A 30.29 CARAT GREEN TOURMALINE AND DIAMOND RING in platinum, set with an octagonal step cut green tourmaline of 30.29 carats between pairs of trapezoid cut diamonds, the diamonds totalling 2.19 carats, inscribed T 30.29ct D2.19ct, full British hallma

Estimate £7,000 - £9,000

GRAFF, AN IMPORTANT 11.20 CARAT DIAMOND FULL ETERNITY RING set all around with a row of sixteen emerald cut diamonds totalling 11.0-11.2 carats, signed Graff and numbered, no assay marks, size K1/2 / 5.5, 12.1g. Accompanied by a Graff insurance valua

Estimate £30,000 - £50,000

A FINE CEYLON NO HEAT SAPPHIRE AND DIAMOND RING set with a cushion cut sapphire of 13.66 carats, the shoulders pave set with single cut diamonds and accented by cabochon sapphires, no assay marks, size O / 7.25, 7.0g. Accompanied by a gemmological re

Estimate £30,000 - £50,000

CARTIER, A DIAMOND DRESS RING in 18ct yellow gold, in crossover design, pave set with round brilliant cut diamonds totalling 1.1-1.3 carats, signed Cartier 1994 and numbered, French assay marks, stamped OR750, size M1/2 / 6.5, 7.3g. Accompanied by a

Estimate £3,000 - £5,000

CARTIER, A DIAMOND HEART ETERNITY RING comprising a row of ten heart motifs set with round brilliant cut diamonds, signed Cartier and numbered, stamped OR 750, size R1/2 / 8.75, 4.9g. Accompanied by a Cartier ring box. 

Estimate £3,000 - £5,000

CHOPARD, A GOLD ICE CUBE RING designed as stylised cubes, signed Chopard and numbered, stamped 750, size M1/2 / 6.5, 15.2g. 

Estimate £800 - £1,200

A FINE CEYLON NO HEAT SAPPHIRE AND DIAMOND THREE STONE RING in platinum, set with a cushion cut sapphire of 5.19 carats, accented on each side by an old cut diamond weighing 1.03 and 1.04 carats respectively, partial British hallmarks, size O / 7.25,

Estimate £8,000 - £12,000

BOUCHERON, A 4.33 CARAT SOLITAIRE DIAMOND RING in platinum, set with an old European cut diamond of approximately 4.33 carats, the shoulders set with tapered baguette cut diamonds, signed Boucheron, French maker's mark, French assay marks, size J1/2

Estimate £50,000 - £70,000

A FINE 26.40 CARAT CEYLON NO HEAT YELLOW SAPPHIRE AND DIAMOND RING set with an oval cut yellow sapphire of 26.40 carats, the stepped shoulders set with old cut diamonds, no assay marks, size I1/2 / 4.5, 13.6g. With a verbal gemmological assessment st

Estimate £10,000 - £15,000

CARTIER, A DIAMOND RING pave set with a section of round brilliant cut diamonds, signed Cartier and numbered, indistinct French maker's mark, French assay marks, size K1/2 / 5.5, 7.2g. 

Estimate £3,000 - £5,000

AN AQUAMARINE AND DIAMOND RING set with an octagonal step cut aquamarine of approximately 24.94 carats, the gallery set with round brilliant cut diamonds totalling 1.3-1.5 carats, no assay marks, size O1/2 / 7.5, 12.5g. 

Estimate £4,000 - £6,000

VAN CLEEF & ARPELS, A MOTHER OF PEARL PURE ALHAMBRA RING set with a quatrefoil shaped black mother of pearl, signed VCA and numbered, French maker's mark, stamped 750, size L1/2 / 6, 11.0g. 

Estimate £1,500 - £2,500

MAUBOUSSIN, A DIAMOND NADJA RING in 18ct yellow gold, the central section pave set with round brilliant cut diamonds, the tapering band with a polished and satin finish, signed Mauboussin Paris and numbered, French assay marks, stamped 18KTS, size P

Estimate £2,000 - £3,000

VAN CLEEF & ARPELS, AN ONYX, EMERALD AND DIAMOND SWAN RING, 1970's, 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 X39 0.82CT, sign

Estimate £8,000 - £12,000

CARTIER, A LAKARDA PANTHERE RING in 18ct white gold, designed as a coiled panther, set with pear cut emerald eyes and an onyx nose, signed Cartier and numbered, French assay marks, maker's mark, size N1/2 / 7, 24.3g. 

Estimate £6,000 - £8,000

KUTCHINSKY, A COLOURED DIAMOND DRESS RING comprising two heart motifs pave set with round brilliant cut pink and white diamonds respectively, accented by foliate motifs set with round brilliant cut yellow, pink and white diamonds, the diamonds all to

Estimate £2,500 - £3,500

DE GRISOGONO, A DIAMOND ZIGANA RING in 18ct white gold, in abstract scrolling design, set with round brilliant cut diamonds totalling 2.00 carats, signed de Grisogono and numbered, de Grisogono maker's mark, Italian assay marks, Swiss assay marks, st

Estimate £4,000 - £6,000

A MODERNIST CITRINE AND DIAMOND BOMBE RING, 1969, in 9ct yellow gold, in abstract design, set with rows of round cut citrines and single cut diamonds, H.B maker's mark, full British hallmarks for London 1969, size M1/2 / 6.5, 12.4g. 

Estimate £300 - £500

AN EMERALD AND DIAMOND THREE STONE RING set with a mixed cut emerald of approximately 1.66 carats, accented on each side by an old cut diamond, the diamonds totalling 0.8-1.0 carat, no assay marks, size Q1/2 / 8.5, 4.3g. 

Estimate £3,000 - £5,000

A FINE THREE STONE DIAMOND RING set with three round brilliant cut diamonds of approximately 1.01, 1.20 and 1.04 carats respectively, no assay marks, size M / 6.25, 3.7g. 

Estimate £8,000 - £12,000

AN ANTIQUE PERIDOT AND DIAMOND CLUSTER RING in yellow gold and silver, set with an oval cut peridot of approximately 2.92 carats in a cluster of old cut diamonds, the diamonds totalling 2.1-2.4 carats, indistinct British hallmarks, size N1/2 / 7, 7.4

Estimate £2,000 - £3,000

CARTIER, A DIAMOND NIGERIA RING in 18ct yellow gold, set all around with rows of round brilliant cut diamonds, the diamonds all totalling 5.0-5.5 carats, French assay marks, signed Cartier and numbered, Cartier size 51, size J1/2 / 5, 9.3g. Accompani

Estimate £7,000 - £9,000

A NATURAL SALTWATER PEARL RING set with a pearl of 12.0mm x 11.0mm, no assay marks, size M1/2 / 6.5, 4.1g. Accompanied by a gemmological report stating the pearl is of natural saltwater origin with no indication of treatment. 

Estimate £3,000 - £5,000

PIAGET, A DIAMOND POSSESSION SPINNING RING, 1998, the band with an articulated central row of pave set round brilliant cut diamonds, the diamonds totalling 1.3-1.5 carats, signed Piaget and numbered, stamped 750, size N1/2 / 7, 16.0g.

Estimate £2,000 - £3,000

AN ANTIQUE DIAMOND HALO RING set with an old European cut diamond of approximately 2.72 carats, within a halo of rose cut diamonds, further rose cut diamonds set to the shoulders, French import marks for 18 carat gold, size L / 5.75, 3.0g. 

Estimate £12,000 - £16,000

AN EXQUISITE COLOMBIAN EMERALD AND DIAMOND RING set with a square step cut emerald of 3.31 carats within a two row border of single cut diamonds, the gallery to the reverse of the head of the ring with fine pierced foliate designs, further diamonds s

Estimate £30,000 - £50,000

AN 11.55 CARAT CEYLON NO HEAT SAPPHIRE AND DIAMOND RING set with a cushion cut sapphire of 11.55 carats in a border of round brilliant cut diamonds, further diamonds set to the shoulders, marked indistinctly, size I1/2 / 4.5, 9.9g. Accompanied by a g

Estimate £12,000 - £16,000

AN EMERALD AND DIAMOND CLUSTER RING set with an octagonal step cut emerald of approximately 1.61 carats, in a cluster of round brilliant cut diamonds totalling 1.2-1.4 carats, no assay marks, size O1/2 / 7.5, 4.2g. 

Estimate £3,000 - £5,000

A PINK TOURMALINE AND DIAMOND RING set with a cushion cut pink tourmaline of 10.90 carats between two emerald cut diamonds, the gallery accented by fleur de lis motifs, inscribed T10.90ct, stamped PT950, size N / 6.75, 8.1g.

Estimate £2,000 - £3,000