A FRENCH DIAMOND BAND RING in 18ct yellow gold, set with baguette cut diamonds, French maker's mark,

A FRENCH YELLOW DIAMOND RING in 18ct yellow gold, the stylised ring set with a round brilliant cut yellow diamond, French maker's mark, French assay marks, size K1/2 / 5.5, 5.1g.

VINTAGE DIAMOND UNICORN DRESS RING mounted in 18ct yellow gold, designed as a unicorn coiled around on itself, with circular cut diamonds set to the eyes, French export assay marks and maker's mark, f

VINTAGE RUBY AND DIAMOND CROSS RING in 18ct yellow gold, the band set with step cut rubies in cross design within a square border of round cut diamonds, French marks, size Q / 8, 13.9g.

VAN CLEEF & ARPELS, A VINTAGE DIAMOND RING, 1970S in 18ct yellow gold, the tapering band pave set round brilliant cut diamonds within a gold border, signed VCA and numbered, French assay marks for 18c

A FRENCH SAPPHIRE AND DIAMOND RING in 18ct yellow gold, set with an oval cut sapphire of approximately 3.57 carats accented by old cut diamonds, French assay marks, size J1/2 / 5, 10.6g. 

A FRENCH RETRO DIAMOND RING in 18ct yellow gold, the geometric face set with two old cut diamonds, accented by rows of rose cut diamonds, French assay mark, size L / 5.5, 7.9g.

A VINTAGE SAPPHIRE AND DIAMOND RING in 18ct yellow gold, set with a cabochon sapphire and an old cut diamond of 1.47 carats, accented by further old mine cut diamonds, French assay marks for 18 carat

AN OPAL AND DIAMOND CLUSTER RING in 18ct yellow gold, set with an oval cabochon opal in a cluster of rose cut diamonds, French import mark, size O / 7, 3.9g.

A FRENCH DIAMOND AND ENAMEL BOMBE RING in 18ct yellow gold, the domed face set with round brilliant cut diamonds with black enamel details, the diamonds totalling 0.9-1.1 carats, French assay marks, s

CARTIER, A TRINITY DE CARTIER DIAMOND RING in 18ct yellow gold, the bands set with round brilliant cut diamonds, maker's mark JC, full British hallmarks, size W / 11, 11.5g.

AN EMERALD AND DIAMOND CLUSTER RING in 18ct yellow gold, set with an emerald cut emerald of 3.02 carats in a border of round cut diamonds, French assay marks, size R / 8.75, 8.5g.

A CITRINE AND DIAMOND DRESS RING in 18ct yellow gold and silver, set with an oval cut citrine within a border of foliate scroll designs set with four round cut diamonds, French assay marks, size N / 6

CHAUMET, A PERIDOT AND DIAMOND RING in 18ct yellow gold, set with a cabochon peridot, accented by round brilliant cut diamonds, signed Chaumet Paris and numbered, French assay mark for 18ct gold, size

LUCIENNE LAZON, A VINTAGE GARNET RING in 18ct yellow gold, set with an oval cut garnet in a stylised mount, the band in a tapering design, maker's mark, French assay marks, size M / 6.25, 9.5g.

Emerald and Diamond Ring 18k yellow gold, the band set with ten French-cut emerald baguettes weighing approximately 1.19 carats in total, bordered by round brilliant-cut diamonds weighing approximatel

AN ANTIQUE SAPPHIRE AND DIAMOND RING in 18ct yellow gold, set with three oval cut sapphires accented by pairs of old cut diamonds, D&F maker's mark, marked indistinctly, size K1/2 / 5.5, 3.6g

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 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

ANTIQUE VICTORIAN DIAMOND SNAKE RING, 1891 in 18ct yellow gold, designed as two snakes, their bodies coiled around each other, set with rose cut diamonds to the eyes, maker's mark GM, two full sets of

A VINTAGE RUBY AND DIAMOND TOI ET MOI RING in 18ct yellow gold, set with a round cut ruby and old cut diamond, accented by rose cut diamonds, L&W maker's mark, stamped 18CT, size J / 4.75,&nb

NO RESERVE - A SAPPHIRE AND DIAMOND CLUSTER RING, EARLY 20TH CENTURY in 18ct yellow gold and platinum, set with an oval cut blue sapphire within a border of single cut diamonds, maker's mark SH&Co, st

A SAPPHIRE AND DIAMOND CLUSTER RING in 18ct yellow gold and platinum, set with an oval cut sapphire, in a halo of old mine cut diamonds, to stylised shoulders, stamped with maker's mark and 18CT & PLA

AN ANTIQUE DIAMOND RING in 9ct yellow gold, set with a rose cut diamond of 7.7mm on a stylised shank, French mark for 9ct gold, size O / 7, 3.8g.

LUCIENNE LAZON, A VINTAGE AMETHYST COCKTAIL RING in 18ct yellow gold, set with a round cut amethyst of approximately 23.69 carats, Lucienne Lazon maker's mark, French assay marks, size M / 6.25, 15.5g