BULGARI, A DIAMOND AND RUBY NATURALIA FISH RING designed as a tropical fish set with round brilliant cut diamonds and a ruby eye, accented by spiga motifs, signed Bvlgari, Italian assay marks, size L1/2 / 6, 8.2g. 

Estimate £1,500 - £2,500

A 2.00 CARAT G COLOUR SOLITAIRE DIAMOND RING set with a round brilliant cut diamond of 2.00 carats, stamped PLAT, size G1/2 / 3.5, 4.0g. Accompanied by a facsimile GIA report stating that the diamond is G colour and VS2 clarity. 

Estimate £10,000 - £15,000

A DIAMOND FULL ETERNITY RING set all around with a row of oval brilliant cut diamonds all totalling 3.45 carats, inscribed 3.45, stamped PLAT, size M / 6.25, 5.6g. 

Estimate £4,000 - £6,000

A COLOMBIAN EMERALD AND DIAMOND RING set with an octagonal step cut emerald of 9.32 carats, accented by round brilliant cut diamonds, inscribed E9.372 D0.11, stamped Pt900, size M1/2 / 6.5, 9.9g. Accompanied by a facsimile GIA report stating that the

Estimate £10,000 - £15,000

A FINE BLACK BOULDER OPAL AND RUBY DRESS RING set with a black boulder opal in a stylised mount accented by round cut rubies, no assay marks, size M / 6.25, 31.0g. 

Estimate £5,000 - £7,000

AN ANTIQUE NATURAL SALTWATER PEARL AND DIAMOND TOI ET MOI RING, EARLY 20TH CENTURY in yellow gold, set with a pearl of 7.5mm and an old cut diamond of approximately 1.03 carats, the band set with further old cut diamonds, no assay marks, size N1/2 /

Estimate £3,500 - £5,500

BOUCHERON, A WOOD DRESS RING in 18ct yellow gold, set with a carved section of wood, signed Boucheron, French assay marks, size L1/2 / 6, 9.3g. 

Estimate £2,000 - £3,000

AN IMPORTANT NATURAL FANCY BLUISH GREEN AND PINK DIAMOND RING set with a radiant cut green diamond of 2.50 carats in a border of calibre cut pink diamonds, the band set with round brilliant cut diamonds, stamped 18K PLAT, size M / 6.25, 5.7g. Accompa

Estimate £200,000 - £300,000

A FINE CARVED PERIDOT INTAGLIO RING set with an oval peridot intaglio carved to depict a coat of arms with crest, no assay marks, size M1/2 / 6.5, 21.2g. 

Estimate £6,000 - £8,000

A SAPPHIRE AND DIAMOND RING set with an oval cut sapphire of approximately 5.64 carats accented on each side by a half moon cut diamond, the shoulders set with round brilliant cut diamonds, the diamonds all totalling 0.8-1.0 carat, stamped PT950, siz

Estimate £3,000 - £5,000

AN EMERALD AND DIAMOND DRESS RING set with an octagonal step cut emerald of approximately 0.96 carats, accented by baguette and round brilliant cut diamonds, inscribed 0.96 0.99, stamped 18K, size N1/2 / 7, 7.4g.  

Estimate £1,500 - £2,000

AN EMERALD AND DIAMOND THREE STONE RING set with an octagonal step cut emerald of approximately 2.50 carats, accented on each side by a tapered baguette cut diamond, Italian assay marks, stamped 750, size M1/2 / 6.5, 7.4g.

Estimate £3,000 - £5,000

BULGARI, A BLUE TOPAZ PYRAMID RING set with a sugarloaf cabochon blue topaz, signed Bulgari, Italian assay marks, stamped 750, size L1/2 / 6, 15.5g. 

Estimate £2,000 - £3,000

A BURMA NO HEAT SPINEL AND DIAMOND RING set with a cushion cut spinel of 9.32 carats in a cluster of round brilliant cut diamonds, accented by baguette cut diamonds, stamped 750, size N1/2 / 7, 8.1g. Accompanied by a facsimile gemmological report sta

Estimate £15,000 - £20,000

A COLOMBIAN MINOR EMERALD AND DIAMOND RING set with an octagonal step cut emerald of approximately 2.02 carats within a border of round cut diamonds, the band set all around with old, round and rose cut diamonds, no assay marks, size H1/2 / 4, 6.8g.

Estimate £6,000 - £8,000

AN IMPORTANT 22.60 CARAT CEYLON NO HEAT SAPPHIRE AND DIAMOND RING in platinum, set with a cushion cut sapphire of 22.60 carats, flanked by two tapered baguette cut diamonds both totalling 0.60 carats, stamped 10% IRID PLAT, size M / 6.25, 11.3g. Acco

Estimate £100,000 - £150,000

AN IMPORTANT 15.21 CARAT DIAMOND FULL ETERNITY RING set all around with a row of emerald cut diamonds totalling 15.21 carats, no assay marks, size M1/2 / 6.5, 11.7g. 

Estimate £30,000 - £50,000

MARIO BUCCELLATI, A FINE DIAMOND AND PEARL RING set with a pearl of 10.1mm between two old cushion cut diamonds, accented by a border of round brilliant cut diamonds, the principal diamonds weighing approximately 1.69 and 1.45 carats respectively, si

Estimate £25,000 - £35,000

AN ANTIQUE MOONSTONE INTAGLIO, ENAMEL AND PEARL RING in yellow gold, set with a moonstone intaglio carved to depict the figure of a classical lady, within a border of seed pearls accented by turquoise enamel, the shoulders designed as floral motifs d

Estimate £3,000 - £5,000

A SAPPHIRE AND DIAMOND DRESS RING set with an oval cut sapphire of approximately 1.73 carats, accented by calibre cut sapphires and round brilliant cut diamonds, no assay marks, size N / 6.75, 6.0g. 

Estimate £1,500 - £2,500

MAUBOUSSIN, A DIAMOND AND ENAMEL RING in 18ct yellow gold, comprising a marquise shape set with three round brilliant cut diamonds, the band relieved in black enamel, signed Mauboussin Paris and numbered, French assay marks, size J / 4.75, 5.5g. 

Estimate £1,500 - £2,500

J.E CALDWELL, AN ESSEX CRYSTAL INTAGLIO RING in 14ct yellow gold, set with a circular Essex crystal intaglio carved and painted to depict a Chow Chow dog, engraved Chee-Moo Dorsey K.Offutt, signed JEC & CO. and numbered, no assay marks, size Q1/2 / 8

Estimate £1,000 - £1,500

AN ART DECO EMERALD AND DIAMOND RING in platinum, set with a row of graduating square and rectangular step cut emeralds, accented by a border of single cut diamonds, stamped PLAT, size K1/2 / 5.5, 5.0g. 

Estimate £6,000 - £8,000

A SOLITAIRE DIAMOND RING set with a marquise cut diamond of approximately 2.60 carats between two tapered baguette cut diamonds, stamped 10% IRID PLAT, size L1/2 / 6, 4.3g. 

Estimate £10,000 - £15,000

A FANCY INTENSE ORANGE YELLOW DIAMOND DRESS RING set with a marquise cut yellow diamond of approximately 3.39 carats in a border of round brilliant cut diamonds, the band set with further diamonds, PT950 18K, size L / 5.75, 10.2g. Accompanied by a fa

Estimate £20,000 - £30,000

A JADEITE JADE AND DIAMOND RING comprising a polished jadeite jade ring, detachable from a yellow gold ring mount set with rows of round brilliant cut diamonds, no assay marks, size M / 6.25, 15.3g. 

Estimate £2,500 - £3,500

A FRENCH COLOMBIAN MINOR EMERALD AND DIAMOND RING in 18ct white gold, set with a rectangular step cut emerald of approximately 8.50 carats, the shoulders set with tapered baguette cut diamonds, French assay marks, size L / 5.75, 5.7g. Accompanied by

Estimate £25,000 - £35,000

BUCCELLATI, A DIAMOND BAND RING the band with rigato engraving, accented by six round brilliant cut diamonds, signed Buccellati Italy, Italian assay marks, size J1/2 / 5, 5.9g. 

Estimate £2,500 - £3,500

BULGARI, A PERIDOT AND IOLITE DOPPIO RING set with an oval cut peridot and an oval cut iolite,  signed Bvglari, stamped 750, size L / 5.75, 14.4g. 

Estimate £4,000 - £6,000

REPOSSI, AN UNHEATED RUBY AND DIAMOND RING set with a cabochon ruby of approximately 16.26 carats, accented by round brilliant and pear cut diamonds, the diamonds all totalling 4.0-4.2 carats, signed Repossi, sizing band stamped 750, size K / 5.25 wi

Estimate £6,000 - £8,000

BULGARI, AN EMERALD AND DIAMOND RING in 18ct yellow and white gold, set with a cabochon emerald over a fluted gold section, accented by two round brilliant cut diamonds, signed Bvlgari, stamped 750, partially obscured Italian assay marks, size Q / 8,

Estimate £3,000 - £5,000

AN IMPORTANT BRAZILIAN 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 totalling

Estimate £60,000 - £80,000

OSCAR HEYMAN & BROTHERS, A RUBY, SAPPHIRE AND DIAMOND CROSSOVER RING set with clusters of calibre cut rubies and sapphires, accented by round brilliant cut diamonds, Oscar Heyman & Brothers maker's mark and numbered, stamped 18K, size M / 6.25, 11.0g

Estimate £6,000 - £8,000

AN EMERALD AND DIAMOND CLUSTER RING set with an octagonal step cut emerald of approximately 1.91 carats in a cluster of oval brilliant cut diamonds, the shoulders set with round brilliant cut diamonds, stamped 18K, size M1/2 / 6.5, 5.0g. 

Estimate £4,000 - £6,000

BULGARI, A DIAMOND TRONCHETTO RING the face pave set with round brilliant cut diamonds, the diamonds all totalling 2.2-2.4 carats, signed Bvlgari, Italian assay marks, size O / 7.25, 12.8g. 

Estimate £6,000 - £8,000

AN EMERALD AND DIAMOND RING set with an octagonal step cut emerald of approximately 2.75 carats, accented on each side by round cut diamonds, stamped 14K, size L / 5.75, 4.8g. 

Estimate £3,000 - £5,000

A DIAMOND DRESS RING set with an old cushion cut diamond of approximately 1.15 carats, the pierced border and foliate style shoulders set with further old cut diamonds, the diamonds all totalling 2.2-2.6 carats, stamped PL, size O1/2 / 7.5, 7.2g.

Estimate £4,000 - £6,000

A SAPPHIRE AND DIAMOND THREE STONE RING set with an oval cut sapphire of approximately 3.49 carats, accented on each side by a half moon cut diamond, the diamonds both totalling 0.65 carats, inscribed 3.49 D0.65, stamped Pt900, size J1/2 / 5, 6.2g. 

Estimate £6,000 - £8,000

A MULTI GEM SPUTNIK RING the domed face set with round cut garnets, amethysts, citrines, peridots, pink tourmalines and blue topaz, no assay marks, size G1/2 / 3.5, 3.9g. 

Estimate £300 - £500

HANS D. KRIEGER, A TANZANITE AND DIAMOND RING set with an oval cut tanzanite of approximately 4.21 carats, the trifurcated band set with round brilliant cut diamonds, the diamonds all totalling 1.4-1.6 carats, Hans D. Krieger maker's mark, stamped 75

Estimate £3,000 - £5,000

TIFFANY & CO., A TYPE A JADEITE JADE RING set with an oval cabochon jadeite jade of approximately 4.97 carats, signed Tiffany & Co., stamped 14K, size O / 7.25, 13.6g. Accompanied by a facsimile GIA report stating that the jadeite is natural and untr

Estimate £8,000 - £12,000

A SAPPHIRE AND DIAMOND RING set with an octagonal step cut sapphire of approximately 9.76 carats within a border of round brilliant cut diamonds, the band and mount set all around with further round brilliant cut diamonds, stamped PT900, size J / 4.7

Estimate £6,000 - £8,000

A DIAMOND GYPSY RING in 9ct white gold, set with three old cut diamonds all totalling 0.8-0.9 carats, full British hallmarks for Sheffield 1997, size P / 7.5, 8.6g.

Estimate £600 - £800

A BURMA NO HEAT RUBY AND DIAMOND RING set with an oval cut ruby of 3.98 carats, accented on each side by an oval brilliant cut diamond, the band set with round brilliant cut diamonds, no assay marks, size M1/2 / 6.5, 5.5g. Accompanied by a facsimile

Estimate £20,000 - £30,000

A RUBY AND DIAMOND RING set with a cushion cut ruby of approximately 3.50 carats between two trillion cut diamonds, the diamonds both totalling 1.6-1.8 carats, no assay marks, size K / 5.25, 7.2g. 

Estimate £18,000 - £22,000

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

A VINTAGE DIAMOND, ONYX AND RUBY DRESS RING in 18ct white gold, the oval face comprising pave set round brilliant cut diamonds, accented by polished onyx and square step cut rubies, the shoulders set with further diamonds, partial British hallmarks,

Estimate £2,000 - £3,000

A PLATINUM WEDDING BAND RING of plain design, stamped PLAT, size T / 9.75, 13.4g. 

Estimate £800 - £1,200

VAN CLEEF & ARPELS, A DIAMOND SNOWFLAKE RING in platinum, the open band comprising a row of snowflake motifs set with round brilliant cut diamonds, within borders of further round brilliant cut diamonds, the diamonds totalling 4.8-5.1 carats, signed

Estimate £18,000 - £25,000

A CEYLON SAPPHIRE AND DIAMOND HEART RING set with a heart cut sapphire of approximately 8.22 carats in a double cluster of round brilliant cut diamonds all totalling 4.0-4.5 carats, no assay marks, size T / 9.5, 15.4g.

Estimate £12,000 - £16,000

A VERY FINE BURMA NO HEAT SPINEL AND DIAMOND RING set with a cushion cut spinel of 2.88 carats, accented by round brilliant and princess cut diamonds, inscribed 2.88, stamped 18K, size N / 6.75, 8.1g. Accompanied by a facsimile GRS report stating tha

Estimate £15,000 - £20,000

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 baguette cut diamonds, inscribed 7 33 D0.40, stamped Pt900, size P / 7.75, 10.0g. Accompanied by a facsimile GIA

Estimate £3,000 - £5,000

A SAPPHIRE AND DIAMOND COCKTAIL RING set with a cabochon sapphire of approximately 8.78 carats in a cluster of marquise and baguette cut diamonds, accented by single cut diamonds, the diamonds all totalling 2.0-2.3 carats, no assay marks, size M / 6.

Estimate £2,500 - £3,500

AN EMERALD AND DIAMOND THREE STONE RING set with an octagonal step cut emerald of approximately 0.58 carats, accented on each side by an emerald cut diamond, stamped PT950 750, size K / 5.25, 4.8g. 

Estimate £1,000 - £1,500