TIFFANY & CO., A TANZANITE AND DIAMOND SOLESTE RING set with a cushion cut tanzanite of approximately 2.03 carats within a double border of round brilliant cut diamonds, the shoulders set with further diamonds, signed Tiffany & Co., stamped Pt950, si

Estimate £4,000 - £6,000

ATTR. ELIZABETH GAGE, A DIAMOND AND RUBY DRESS RING in 18ct yellow gold, set with an old cut diamond of approximately 0.51 carats accented by rectangular step cut rubies and baguette cut diamonds, full British hallmarks for London 1994, size O / 7.25

Estimate £3,000 - £5,000

A FINE GREEN TOURMALINE AND DIAMOND RING set with an octagonal step cut green tourmaline of 29.00 carats, the band set with round brilliant cut diamonds, stamped 14K, size L1/2/ 6, 13.4g. 

Estimate £8,000 - £12,000

A 2.00 CARAT SOLITAIRE DIAMOND RING set with a round brilliant cut diamond of 2.00 carats, the base of the claw setting accented by a row of round brilliant cut diamonds, no assay marks, size J1/2 / 5, 3.9g. Accompanied by a facsimile gemmological re

Estimate £8,000 - £12,000

A BLACK OPAL AND DIAMOND RING set with an oval black opal of approximately 9.63 carats in a border of round brilliant cut diamonds, the diamonds all totalling 0.9-1.0 carat, no assay marks, size O1/2 / 7.5, 7.2g. 

Estimate £5,000 - £7,000

A PEARL, DIAMOND AND ENAMEL DRESS RING set with a baroque pearl of 17.9mm in a border of blue enamel, accented by trios of round brilliant cut diamonds, stamped 750, size M1/2 / 6.5, 16.8g. 

Estimate £1,500 - £2,500

A DIAMOND BUBBLE RING in platinum, comprising three bands set with round brilliant cut diamonds, accented by smaller round brilliant cut diamonds, the diamonds all totalling 1.9-2.0 carats, full British hallmarks, size N / 6.75, 16.0g. 

Estimate £2,500 - £3,500

A 8.57 CARAT CEYLON NO HEAT SAPPHIRE AND DIAMOND CLUSTER RING in 18ct white gold, set with a cushion cut sapphire of 8.57 carats in a cluster of round brilliant cut diamonds, the diamonds all totalling 1.51 carats, full British hallmarks, size O1/2 /

Estimate £30,000 - £40,000

A DIAMOND ENGAGEMENT RING in platinum, set with an asscher cut diamond of 3.19 carats between two tapered baguette cut diamonds, partial British hallmarks, size K1/2 / 5.5, 5.7g. 

Estimate £10,000 - £15,000

AN AQUAMARINE AND DIAMOND DRESS RING set with an octagonal step cut aquamarine of approximately 17.59 carats, the geometric pierced mount accented by old and single cut diamonds, no assay marks, size M / 6.25, 9.5g. 

Estimate £3,000 - £5,000

A JADEITE JADE AND DIAMOND DRESS RING set with a polished ring of jadeite jade, accented by pave set round brilliant cut diamonds, signed LÜTCH, stamped 750, size L1/2 / 6, 16.8g. 

Estimate £1,500 - £2,500

AN ORANGE SAPPHIRE AND DIAMOND CLUSTER RING in 18ct white gold, set with a cushion cut orange sapphire of 4.32 carats within a double cluster of round brilliant cut diamonds, further diamonds set to the shoulders, the diamonds all totalling 1.5-1.6 c

Estimate £2,500 - £3,500

A DIAMOND RING set with four round brilliant cut diamonds all totalling 4.08 carats, inscribed 4/4.08, stamped 18K, size Q / 8, 6.1g. 

Estimate £4,000 - £6,000

FAVERO, A TANZANITE AND DIAMOND RING in 18ct white gold, set with a cushion cut tanzanite of approximately 18.72 carats within a border of round brilliant cut diamonds, the shoulders set with further diamonds, signed Favero, Italian assay marks, stam

Estimate £3,500 - £4,500

A FINE UNTREATED EMERALD AND DIAMOND CLUSTER RING set with an octagonal step cut emerald of 5.23 carats in a cluster of round cut diamonds, the shoulders set with further round cut diamonds, no assay marks, size M / 6.25, 8.0g. Accompanied by a gemmo

Estimate £15,000 - £20,000

VAN CLEEF & ARPELS, A LAPIS LAZULI AND DIAMOND PHILIPPINES RING in 18ct yellow gold, the shoulders set with polished lapis lazuli, accented by single cut diamonds, signed VCA and numbered, stamped 750, size I1/2 / 4.5, 7.0g. 

Estimate £2,500 - £3,500

A 12.89 CARAT CEYLON NO HEAT YELLOW SAPPHIRE AND DIAMOND RING set with a cushion cut yellow sapphire of 12.89 carats, accented by round brilliant and baguette cut diamonds, marked indistinctly, size L1/2 / 6, 9.7g. Accompanied by a facsimile gemmolog

Estimate £20,000 - £25,000

A DIAMOND HEART RING in platinum, set with a heart cut diamond of 2.50 carats, accented on each side by a pear cut diamond, full British hallmarks, size L / 5.75, 4.8g. 

Estimate £10,000 - £15,000

FAVERO, AN AQUAMARINE AND DIAMOND DRESS RING in 18ct white gold, set with a cushion cut aquamarine of 24.79 carats, the shoulders set with round brilliant cut diamonds totalling 1.21 carats, inscribed A.Ct 24.79 D.Ct 1.21, signed Favero, Italian assa

Estimate £4,000 - £6,000

A 5.01 CARAT SOLITAIRE DIAMOND RING set with a round brilliant cut diamond of 5.01 carats, the band set with round brilliant cut diamonds, stamped 750, size N1/2 / 7, 5.4g. Accompanied by a gemmological report stating that the diamond is H colour and

Estimate £25,000 - £35,000

A FANCY INTENSE GREENISH BLUE DIAMOND RING in platinum, set with an emerald cut blue diamond of 0.99 carats in a cluster of round brilliant cut diamonds, full British hallmarks, size M / 6.25, 5.8g. Accompanied by a facsimile GIA report stating that

Estimate £12,000 - £16,000

FAVERO, AN AQUAMARINE, RUBY AND DIAMOND RING in 18ct white gold, set with an oval cut aquamarine of approximately 4.74 carats in a border of round cut rubies, the shoulders set with round brilliant cut diamonds, signed Favero, Italian assay marks, st

Estimate £1,000 - £1,500

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 £18,000 - £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 £2,500 - £3,500

FAVERO, A SAPPHIRE AND DIAMOND RING in 18ct white gold, set with an oval cabochon sapphire of approximately 7.93 carats, the stylised shoulders set with round brilliant cut diamonds, inscribed D. ct. 0.43, Italian assay marks, stamped 750, size N / 6

Estimate £1,200 - £1,600

A COLOMBIAN EMERALD AND DIAMOND RING set with an octagonal step cut emerald of 3.42 carats between two trapezoid cut diamonds, no assay marks, size M / 6.25, 6.0g. Accompanied by a facsimile gemmological report stating that the emerald is of Colombia

Estimate £20,000 - £30,000

FAVERO, A TANZANITE AND DIAMOND DRESS RING in 18ct white gold, set with an octagonal step cut tanzanite of 4.40 carats, the stepped shoulders set with baguette cut diamonds, the shoulders pave set with round brilliant cut diamonds, inscribed T. Ct. 4

Estimate £1,500 - £2,000

A 5.43 CARAT SOLITAIRE DIAMOND RING in 18ct yellow gold, set with a round brilliant cut diamond of 5.43 carats, partial British hallmarks, size M / 6.25, 5.6g. 

Estimate £30,000 - £50,000

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 £12,000 - £18,000

FAVERO, A LAPIS LAZULI AND DIAMOND DRESS RING in 18ct white gold, comprising an oval cabochon lapis lazuli set with round brilliant cut diamonds, inscribed LPG 2.16 + D. Ct 0.30, signed Favero, Italian assay marks, stamped 750, size M1/2 / 6.5, 8.4g.

Estimate £800 - £1,200

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 £8,000 - £12,000

A TANZANITE AND DIAMOND RING in platinum, set with a cushion cut tanzanite of 9.02 carats in a border of round brilliant cut diamonds, the bifurcated shoulders set with further diamonds, full British hallmarks, size M1/2 / 6.5, 9.5g.

Estimate £4,500 - £6,500

A DIAMOND DRESS RING in platinum, set with an old European cut diamond of approximately 3.81 carats in a border of tapered baguette cut diamonds, the band set with round brilliant cut diamonds, the diamonds all totalling 5.9-6.1 carats, full British

Estimate £12,000 - £16,000

PALOMA PICASSO FOR TIFFANY AND CO., A BLACK SPINEL SUGAR STACKS RING the domed face pave set with round cut black spinels, signed Paloma Picasso, signed Tiffany & Co., stamped Au750, size K1/2 / 5.5, 4.8g. 

Estimate £600 - £800

CARTIER, A DIAMOND REFLECTION DE CARTIER WEDDING BAND RING in 18ct white gold, the flexible band set all around with rows of round brilliant and baguette cut diamonds totalling 2.9-3.1 carats, signed Cartier and numbered, French assay marks, stamped

Estimate £18,000 - £26,000

FAVERO, AN AQUAMARINE AND DIAMOND RING in 18ct white gold, set with an oval cut aquamarine of 3.95 carats, the mount and shoulders set with round brilliant cut diamonds, inscribed A. Ct. 3.95 D. Ct. 0.34, signed Favero, Italian assay marks, stamped 7

Estimate £1,200 - £1,800

A RUBY AND DIAMOND THREE STONE RING set with an oval cut ruby of approximately 2.65 carats, accented on each side by a transitional cut diamond, stamped 18CT, size N1/2 / 7, 5.0g. 

Estimate £3,500 - £5,500

A ZAMBIAN EMERALD AND DIAMOND RING set with a pear cut emerald of 4.47 carats in a border of round brilliant cut diamonds, the bifurcated shoulders set with further diamonds, stamped 18K, size M / 6.25, 5.9g. Accompanied by a facsimile gemmological r

Estimate £5,000 - £7,000

A FANCY INTENSE YELLOW DIAMOND CLUSTER RING set with a cushion cut yellow diamond of 1.27 carats within a cluster of round brilliant cut diamonds totalling 2.6-2.8 carats, no assay marks, size M / 6.25, 7.7g. Accompanied by a facsimile GIA report sta

Estimate £10,000 - £15,000

SCHLUMBERGER STUDIOS FOR TIFFANY & CO., A DIAMOND VIGNE RING the openwork ring in foliate design, set throughout with round brilliant and marquise cut diamonds, the diamonds totalling 2.5-2.7 carats, signed Schlumberger Studios, signed Tiffany & Co.,

Estimate £12,000 - £16,000

A G COLOUR 1.34 CARAT SOLITAIRE DIAMOND RING in platinum, set with a princess cut diamond of 1.34 carats, the band set all around with round brilliant cut diamonds, partial British hallmarks, size I / 4.25, 4.8g. Accompanied by a facsimile gemmologic

Estimate £6,000 - £8,000

A FANCY YELLOW AND WHITE DIAMOND RING set with a pear cut fancy yellow diamond of approximately 2.15 carats, accented on each side by a pear cut diamond, no assay marks, size M1/2 / 6.5, 4.9g. Accompanied by a facsimile gemmological report stating th

Estimate £6,000 - £8,000

A FINE 7.12 CARAT CEYLON NO HEAT SAPPHIRE AND DIAMOND RING set with an oval cut sapphire of 7.12 carats in a border of round brilliant cut diamonds, the bifurcated shoulders set with round brilliant and baguette cut diamonds, stamped 18CT 750, size M

Estimate £15,000 - £25,000

A DIAMOND RING set with a pear cut diamond of approximately 1.32 carats between two further pear cut diamonds, partial British hallmarks, size Q / 8, 6.4g. 

Estimate £8,000 - £12,000

AN UNHEATED MOZAMBIQUE RUBY AND DIAMOND RING set with an oval cut ruby of 2.88 carats in a border of round brilliant cut diamonds, further diamonds set to the shoulders, no assay marks, size L / 5.75, 4.6g. Accompanied by a facsimile gemmological rep

Estimate £3,000 - £5,000

A DIAMOND HEART RING set with a heart cut diamond of 2.01 carats, the band set with round brilliant cut diamonds, inscribed 62/0.55ct, stamped 18K, size M1/2 / 6.5, 5.3g. 

Estimate £7,000 - £9,000