AN AQUAMARINE AND DIAMOND DRESS RING in platinum, set with an octagonal step cut aquamarine of approximately 16.72 carats, accented by transitional and round cut diamonds, no assay marks, size P / 7.75, 9.8g. 

Estimate £4,000 - £6,000

CARTIER, AN AMETHYST AND TURQUOISE DELICES DE GOA RING in 18ct rose gold, comprising round cabochon amethyst and turquoise with a round brilliant cut diamond, signed Cartier and numbered, stamped 750, size M / 6.25, 9.0g. Accompanied by a Cartier box

Estimate £1,500 - £2,500

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 SAPPHIRE AND DIAMOND RING in 18ct white gold, set with an oval cut sapphire of approximately 2.92 carats accented by a row of baguette cut diamonds, stamped 750, size I / 4.25, 12.6g. 

Estimate £2,000 - £3,000

A BURMA NO HEAT RUBY AND DIAMOND CLUSTER RING in 18ct white gold, set with a cushion cut ruby of approximately 3.0 carats in a cluster of round brilliant cut diamonds all totalling 1.2-1.4 carats, French assay marks, size O / 7.25, 9.0g. 

Estimate £6,000 - £8,000

TIFFANY & CO., A 0.92 CARAT SOLITAIRE DIAMOND ENGAGEMENT RING in platinum, comprising a round brilliant cut diamond of 0.92 carats in a six claw mount, signed Tiffany & Co., full British hallmarks, size I / 4.25, 5.5g. Accompanied by a gemological re

Estimate £3,000 - £5,000

A PARAIBA TOURMALINE AND DIAMOND RING in 18ct white gold, set with an oval cut Paraiba tourmaline of 20.85 carats in a border of round brilliant cut diamonds to stylised shoulders set with round brilliant cut diamonds, all totalling 1.0-1.2 carats, p

Estimate £25,000 - £35,000

A GREEN TOURMALINE AND DIAMOND BALLERINA RING in platinum, set with an octagonal step cut green tourmaline of approximately 6.49 carats, in a cluster of tapered baguette cut diamonds, no assay marks, size M / 6.25, 10.1g. 

Estimate £5,000 - £7,000

A PIGEON'S BLOOD BURMESE RUBY AND DIAMOND RING in platinum and 18ct yellow gold, set with a cushion cut ruby of 2.99 carats, the band set with round brilliant cut diamonds, full British hallmarks, size L / 5.75, 5.2g. Accompanied by a gemmological re

Estimate £8,000 - £12,000

A FANCY INTENSE PURPLISH-PINK AND WHITE DIAMOND CLUSTER RING in platinum, set with a cushion cut pink diamond of 1.00 carat in a cluster of round brilliant cut diamonds, the white diamonds all totalling 0.74 carats, no assay marks, size N / 6.75, 5.9

Estimate £12,000 - £16,000

AN IMPORTANT 31.49 CARAT COLOMBIAN EMERALD AND DIAMOND RING in platinum and 18ct yellow gold, set with an octagonal step cut emerald of 31.49 carats, in two concentric borders of round brilliant cut diamonds, the shoulders set with trapeze cut and bu

Estimate £120,000 - £160,000

A CEYLON NO HEAT SAPPHIRE RING in white gold, set with an octagonal step cut sapphire of approximately 8.75 carats, no assay marks, size N / 6.75, 4.1g. Accompanied by a gemmological report stating the sapphire is of Sri Lankan (Ceylon) origin with n

Estimate £10,000 - £15,000

A FINE 8.36 CARAT UNHEATED RUBY AND DIAMOND CLUSTER RING in 18ct white gold, set with an oval cut unheated ruby of 8.35 carats in a stylised cluster of baguette cut, marquise cut and round brilliant cut diamonds, no assay marks, M1/2 / 6.75, 12.7g. A

Estimate £80,000 - £120,000

AN ANTIQUE DIAMOND AND SAPPHIRE CLUSTER RING in 18ct yellow gold, set with an old cut diamond of approximately 1.36 carats, in a cluster of square step cut sapphires and further old cut diamonds, stamped 18CT, size N1/2 / 7, 5.4g. 

Estimate £1,500 - £2,500

A BURMA NO HEAT RUBY AND DIAMOND RING in 18ct white gold, set with a cushion cut ruby of 1.08 carats within a cluster of round brilliant cut diamonds, with further diamonds to the band, British hallmarks, size L / 5.5, 3.8g. Accompanied by a gemologi

Estimate £3,000 - £5,000

AN EMERALD AND DIAMOND THREE STONE RING in 18ct yellow gold, set with an octagonal step cut emerald of 3.29 carats between two round brilliant cut diamonds both totalling approximately 0.90 carats, full British hallmarks, size N / 6.75, 4.9g. Accompa

Estimate £8,000 - £12,000

A DIAMOND DRESS RING in platinum, set with a heart brilliant cut diamond of 2.10 carats, the band half set with a row of princess cut diamonds, full British hallmarks for platinum, size N / 6.5, 7.2g. 

Estimate £10,000 - £15,000

AN ANTIQUE ART NOUVEAU FRENCH CONCH SHELL, DIAMOND AND PEARL RING in 18ct yellow gold, designed as a woman with long flowing hair which forms the band, her face formed of carved shell set with a conch shell hat accented by an old cut diamond, accente

Estimate £10,000 - £15,000

A SAPPHIRE AND DIAMOND TIARA RING in 18ct yellow gold, set with a round cut sapphire of approximately 1.07 carats and a round brilliant cut diamond of approximately 0.75 carats, accented by old and rose cut diamonds, stamped 750, size M / 6.25, 3.3g.

Estimate £1,500 - £2,500

AN ANTIQUE DIAMOND RING in 14ct yellow gold and silver, set with an old cut diamond of approximately 1.06 carats in a cluster of old cut diamonds, the diamonds all totalling 1.6-1.8 carats, stamped 585, size P / 7.75, 3.6g.

Estimate £5,000 - £7,000

MAUBOUSSIN, A DIAMOND NADJA RING in 18ct white 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 750, size L / 5

Estimate £1,000 - £1,500

A CEYLON NO HEAT SAPPHIRE AND DIAMOND RING in platinum, set with an octagonal step cut sapphire of 13.49 carats in a border of round brilliant cut diamonds all totalling 1.0-1.2 carats, no assay marks, size O1/2 / 7.5, 8.3g. Accompanied by a gemmolog

Estimate £6,000 - £8,000

A 4.12 CARAT BURMA NO HEAT RUBY RING in yellow gold, set with a round cut ruby of 4.12 carats, no assay marks, size P / 7.75, 3.9g. Accompanied by a gemmological report stating that the ruby is of Burmese (Myanmar) origin with no indication of heat t

Estimate £20,000 - £30,000

A 5.36CT UNHEATED BURMA SPINEL AND DIAMOND RING in 18ct white gold, set with a mixed cut spinel of 5.36 carats to a bombe style head pave set with round brilliant cut diamonds totalling 1.0-1.5 carats, to a bifurcated band, stamped 750, size L1/2 / 6

Estimate £8,000 - £12,000

A DEMANTOID GARNET AND DIAMOND THREE STONE RING in platinum and 18ct yellow gold, set with a cushion cut demantoid garnet of approximately 1.85 carats accented on each side by an old European cut diamond, the diamonds totalling 0.7-0.8 carats, stampe

Estimate £5,000 - £7,000

A RUBELLITE TOURMALINE AND DIAMOND RING in 18ct white gold, set with an oval cut rubellite tourmaline of approximately 8.15 carats, to a bifurcated band set with round brilliant cut diamonds, partial British hallmarks, size N1/2 / 7, 6.2g.

Estimate £3,000 - £5,000

A 9.96 CARAT BURMA NO HEAT RUBY AND DIAMOND RING in yellow gold, set with an oval cut ruby of 9.96 carats in a border of round brilliant cut diamonds, no assay marks, size Q / 8, 15.8g. Accompanied by a gemmological report stating that the ruby of of

Estimate £50,000 - £70,000

A CEYLON NO HEAT SAPPHIRE AND DIAMOND RING in 18ct white gold, set with an octagonal step cut sapphire of 10.10 carats between two tapered baguette cut diamonds both totalling 0.66 carats, inscribed D0.66 SP10.10, stamped Au750, size N / 6.75, 7.3g.

Estimate £18,000 - £24,000

BULGARI, AN IMPORTANT COLOMBIAN EMERALD AND DIAMOND RING in platinum, set with an oval cut Colombian emerald of 10.64 carats, in two concentric borders of round brilliant cut diamonds, the diamonds totalling 5.4-5.8 carats, stamped BVLGARI PT900, siz

Estimate £60,000 - £80,000

AN ANTIQUE STUART CRYSTAL PRINCE CHARLES EDWARD STUART PORTRAIT MINIATURE RING in yellow gold, set with a portrait miniature of Prince Charles Edward Stuart beneath a Stuart crystal, no assay marks, size K / 5.25, 6.8g. The miniature likely based on

Estimate £4,000 - £6,000

A DIAMOND TRINITY RING in yellow, rose and white gold, comprising three interlocking tricolour rings pave set throughout with round brilliant cut diamonds, no assay marks, size N / 6.75, 9.0g. 

Estimate £2,000 - £3,000

A FINE OLD CUT DIAMOND CLUSTER RING in platinum, set with an old cut diamond of approximately 1.13  carats in a cluster of old cut diamonds, the stepped shoulders set with single cut diamonds, the diamonds all totalling 3.0-3.4 carats, no assay marks

Estimate £6,000 - £8,000

A PINK AND YELLOW DIAMOND THREE STONE RING in yellow gold and platinum, set with a radiant cut pink diamond of 1.18 carats between two radiant cut yellow diamonds of 0.56 and 0.52 carats respectively, no assay marks, size M / 6.25, 6.2g. Accompanied

Estimate £18,000 - £22,000

A CEYLON NO HEAT SAPPHIRE AND DIAMOND RING in platinum, set with an oval cut sapphire of 4.51 carats in a cluster of round brilliant cut diamonds, the bifurcated band set with further diamonds, inscribed 4.51 D0.60, stamped PT900, size M1/2 / 6.5, 6.

Estimate £4,000 - £6,000

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

RETURN - CARTIER A 1.10 CARAT SOLITAIRE DIAMOND ENGAGEMENT RING in platinum, comprising a round brilliant cut diamond of 1.10 carats, signed Cartier, stamped PT950, size K1/2 / 5.5, 5.6g. Accompanied by a gemmological report stating that the diamond

Estimate £7,000 - £9,000

A RUBY AND DIAMOND CLUSTER RING in platinum, set with an oval cut ruby of 11.03 carats in a cluster of round brilliant cut diamonds all totalling 1.90 carats, stamped PLAT, size L / 5.75, 13.9g. 

Estimate £3,000 - £5,000

A BLUE AND PINK DIAMOND TOI ET MOI RING in platinum, set with a round brilliant cut pink diamond of 1.00 carat and a round brilliant cut blue diamond of 1.09 carats, full British hallmarks, size L1/2 / 6, 8.1g. Accompanied by two gemological reports

Estimate £18,000 - £22,000

RENE KERN, A FINE EMERALD AND DIAMOND RING in platinum, set with an octagonal step cut emerald of 1.01 carats within a cluster of pear and marquise cut diamonds, the diamonds all totalling 2.6-2.8 carats, signed KERN, stamped PT, size N / 6.5, 8.0g.

Estimate £4,000 - £6,000

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 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

A CARNELIAN INTAGLIO RING, POSSIBLY ANCIENT in yellow gold, set with an oval carnelian intaglio carved to depict two classical women, no assay marks, size I1/2 / 4.5, 13.4g. 

Estimate £2,500 - £3,500

A DIAMOND SEVEN STONE RING in 18ct yellow gold, the tapering band set with seven old cut diamonds all totalling 2.2-2.4 carats, French assay marks, size M1/2 / 6.5, 8.4g. 

Estimate £2,000 - £3,000

RENE BOIVIN, A RUBY RING in 18ct yellow gold, set with two round cabochon rubies on a twisted gold band, French assay marks, size H1/2 / 4, 15.8g. Accompanied by a certificate of authentication from Francoise Cailles and Jean-Norbert Salit. 

Estimate £3,000 - £5,000

RETURN - CARTIER, A 1.03 CARAT DIAMOND BALLERINE RING in platinum, comprising a central round brilliant cut diamond of 1.03 carats accented by pave set diamonds to the shoulders, signed Cartier, stamped PT950, SIZE I / 4.25, 6.1g. Accompanied by a ge

Estimate £6,000 - £8,000

A PINK DIAMOND AND DIAMOND RING / PENDANT in 18ct white gold, set with an emerald cut pink diamond of 0.90 carats in a border of round brilliant cut pink diamonds and marquise and round brilliant cut white diamonds, the white diamonds all totalling 3

Estimate £12,000 - £16,000

A 1.01 CARAT SOLITAIRE DIAMOND RING in platinum, the wide band set with an emerald cut diamond of 1.01 carats, full British hallmarks, size O / 7.25, 14.0g. Accompanied by a gemological report stating that the diamond is of F colour and VVS1 clarity.

Estimate £2,500 - £3,500

A BURMA NO HEAT SAPPHIRE AND DIAMOND RING in 18ct white gold, set with a cushion cut sapphire of 5.31 carats between two pear cut sapphires, each set within a border of round brilliant cut diamonds, no assay marks, size N / 6.75, 8.9g. Accompanied by

Estimate £6,000 - £8,000