A FRENCH YELLOW DIAMOND RING in 18ct yellow gold, the stylised ring set with a round brilliant cut

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.

A DIAMOND AND RUBY RING in 18ct yellow gold, stylised as the word KISS set with round brilliant cut diamonds and round cut rubies, stamped 750, size P1/2 / 8, 6.0g.

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

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

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 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

NO RESERVE - A DIAMOND TOI ET MOI RING in 18ct yellow gold, set with two round brilliant cut diamonds within a stylised band, stamped 18ct, size Q / 8, 3.4g.

NO RESERVE - A DIAMOND TOI ET MOI RING in 18ct yellow gold, set with two round brilliant cut diamonds within a stylised band, stamped 18ct, size Q / 8, 3.4g.

An 18ct yellow gold and solitaire diamond ring set with a round brilliant-cut diamond of approximately 1.07 carats, approximate colour and clarity H/I, I1, eight-claw set in yellow gold, hallmarks rub

An 18ct yellow gold and solitaire diamond ring set with a round brilliant-cut diamond of approximately 0.24 carats, approximate colour and clarity J/K, SI1/2, size L, 3.6 grams.

A SOLITAIRE DIAMOND RING in 18ct yellow gold, set with a round brilliant cut diamond of 0.50 carats, British hallmarks, size G.5 / 3.75, 2.6g.

An 18ct yellow gold and diamond ring the navette-shaped mount pave-set with round brilliant-cut diamonds, size P, 2.8 grams.

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.

A VINTAGE DIAMOND GYPSY RING in 18ct yellow gold, set with a round brilliant cut diamond, band split, stamped 18ct, size L / 5.75, 4.5g.

NO RESERVE - A VINTAGE DIAMOND CLUSTER RING in 18ct yellow gold, set with a round brilliant cut diamond in a cluster of single cut diamonds, stamped E1165, size N / 6.75, 3.6g. 

A DIAMOND DRESS RING in 18ct yellow gold, set with five principal round brilliant cut diamonds, accented by two rows of round cut diamonds, stamped 750, size K / 5.25, 4.7g. 

A DIAMOND CLUSTER RING in 18ct yellow gold, set with a cluster of round brilliant cut diamonds all totalling 3.4-3.6 carats, full British hallmarks for 18ct gold, size N / 7, 6.0g.

CHAUMET, A DIAMOND RING in 18ct yellow gold, the bombe face set with clusters of round brilliant cut diamonds, signed Chaumet Paris and numbered, stamped 750, size K1/2 / 5.5, 9.8g.

A DIAMOND CLUSTER RING in 18ct yellow gold, set with a cluster of round brilliant cut diamonds all totalling 1.8-2.0 carats, British import marks, size N / 6.5, 4.1g.

NO RESERVE - A DIAMOND THREE STONE RING in 18ct yellow gold, set with three round brilliant cut diamonds with a combined total weight of approximately 1.30 carats, British hallmarks for 18ct gold, siz

A DIAMOND THREE STONE RING in 18ct yellow gold, set with three round brilliant cut diamonds all totalling 0.9-1.0 carat, partial British hallmarks, size N / 6.5, 3.2g.

AN ANTIQUE DIAMOND FIVE STONE RING in 18ct yellow gold, set with five round brilliant cut diamonds, partial British hallmarks for Birmingham 1918, size O1/2 / 7.5, 3.8g. 

A DIAMOND BAND RING in 18ct yellow gold, set with a row of round brilliant cut diamonds, punctuated by pairs of round brilliant cut diamonds, British hallmarks, size P / 7.5, 4.9g.

NO RESERVE - A DIAMOND SOLITAIRE ENGAGEMENT RING in 18ct yellow gold, set with a round brilliant cut diamond of approximately 0.23 carats, full British hallmarks for 18ct gold, size K / 5, 2.8g.