A CHROME TOURMALINE AND DIAMOND RING in 18ct yellow gold, set with a cushion cut chrome green

A CHROME TOURMALINE AND DIAMOND RING in 18ct yellow gold, set with a cushion cut chrome green tourmaline of 12.76 carats in a stylised border of round brilliant cut diamonds, partial British hallmarks

A VINTAGE GREEN TOURMALINE AND DIAMOND DRESS RING in 18ct yellow gold, set with a step cut green tourmaline of 2.11 carats, between round brilliant cut diamonds, stamped 18K, size O / 7.25, 3.8g.

A GREEN TOURMALINE AND DIAMOND RING in 18ct yellow gold, set with a cabochon green tourmaline in a cluster of single cut diamonds, full British hallmarks, size N / 6.75, 5.7g.

Tourmaline, diamond and 14k yellow gold ring Featuring (1) cushion-cut green tourmaline, weighing approximately 4.20 cts., accented by (1) full-cut diamond, set in a 14k yellow gold mounting, size 7 1

A BURMA NO HEAT PINK SPINEL AND DIAMOND RING in 18ct yellow gold, set with a cushion cut pink spinel of approximately 2.25 carats accented by rose cut diamonds, full British hallmarks, size L1/2 / 6,

AN ANTIQUE SAPPHIRE AND DIAMOND RING in 18ct yellow gold, set with alternating cushion cut sapphires and old cut diamonds, British hallmarks for 18ct gold, size O / 7, 3.1g.

RUBY AND DIAMOND RING in 18ct yellow gold, set with three cushion cut rubies and alternating round cut diamonds, stamped 18CT, size N / 6.5, 1.9g.

AN EMERALD AND DIAMOND CLUSTER RING in 18ct yellow gold, set with a cushion cut emerald of 3.65 carats in a cluster of old cut diamonds totalling 1.8-2.0 carats, stamped 18ct, size O / 7, 7.4g.

AN AQUAMARINE AND DIAMOND CLUSTER RING in 18ct yellow gold, set with a cushion cut aquamarine of 2.00 carats, in a cluster of round brilliant cut diamonds, British hallmarks, size M / 6, 5.7g.

A RUBY AND DIAMOND CLUSTER RING in 18ct yellow gold, set with a cushion cut ruby of 1.11 carats in a border of round and baguette cut diamonds totalling 0.54 carats, stamped 18K, size M / 6, 5.1g.

NO RESERVE - AN ANTIQUE EDWARDIAN SAPPHIRE AND DIAMOND RING, 1908 in 18ct yellow gold, set with three cushion cut sapphires punctuated by pairs of round cut diamonds, full British hallmarks for Cheste

A DIAMOND CLUSTER RING in 18ct yellow gold, set with an antique cushion cut diamond of 1.51 carats in a cluster of old cut diamonds totalling 1.4-1.6 carats, the diamonds all totalling 2.9-3.1 carats,

AN ORANGE SAPPHIRE AND DIAMOND RING in 18ct white and yellow gold, set with a cushion cut orange sapphire of approximately 5.4 carats between two trilliant cut diamonds totalling 0.8-0.9 carats, maker

AN ANTIQUE EMERALD AND DIAMOND RING in 18ct yellow gold, set with square step and cushion cut emeralds accented by a row of old cut diamonds, C.G maker's mark, full British hallmarks for Birmingh

AN ANTIQUE FIRE OPAL AND DIAMOND RING in 18ct yellow gold and silver, set with a cushion cut fire opal of 1.72 carats, within a border of single cut diamonds, stamped 18, size M / 6.25, 3.2g.

A PINK TOURMALINE AND DIAMOND RING in 18ct yellow gold, set with an oval cut pink tourmaline of 2.36 carats, the band set with two marquis cut diamonds both totalling 0.24 carats, stamped K18, size K

AN EMERALD AND DIAMOND THREE STONE RING in 18ct yellow gold, set with a cushion cut emerald between two round brilliant cut diamonds, British hallmarks, size J / 4.5, 2.9g.

AN ANTIQUE SAPPHIRE AND DIAMOND RING in 18ct yellow gold, set with three round and cushion cut sapphires, punctuated by pairs of rose cut diamonds, maker's mark 'E&S', full British hallmarks for 18ct

AN ANTIQUE SAPPHIRE AND DIAMOND RING, 19TH CENTURY in 18ct yellow gold, set with a cushion cut sapphire of 0.95 carats, within a border of old cut diamonds, signed RS, stamped 18ct, size M / 6.25, 3.8

AN ART DECO SAPPHIRE AND DIAMOND DRESS RING in 18ct yellow gold and platinum, set with a cushion cut blue sapphire of 0.93 carats, within a border of old cut diamonds, stamped Pt 18ct, size M / 6, 3.1

AN ANTIQUE SAPPHIRE AND DIAMOND RING 1911 in 18ct yellow gold, set with a trio of cushion cut blue sapphires, accented by two old cut diamonds, full British hallmarks for Birmingham 1911, size M / 6,

AN ANTIQUE CEYLON NO HEAT SAPPHIRE AND DIAMOND RING in 18ct yellow gold, the navette shaped face set with a cushion cut blue sapphire of 1.18 carats, within a surround of old European brilliant cut di

AN ANTIQUE RUBY AND DIAMOND DRESS RING in 18ct yellow gold, set with a trio of graduated cushion cut rubies accented by two old cut diamonds, with scrolling decoration to the gallery, stamped 18ct, si

A TANZANITE AND DIAMOND DRESS RING in 18ct yellow gold, the tapering band set with a cushion cut tanzanite of 1.09 carats, between shoulders set with round cut diamonds, stamped 18K, size P / 7.5, 4.6