AN OPAL RING in 14ct yellow gold, set with a cabochon opal in a stylised border, London import

AN OPAL AND DIAMOND DRESS RING in high carat yellow gold and silver, set with an oval cabochon opal within a border of rose cut diamonds, with stylised decoration to the band, unmarked, size N / 7, 3.

AN OPAL AND DIAMOND RING in 14ct yellow gold, set with a cabochon opal accented by round cut diamonds, stamped 585 14K, size N / 6.5, 2.5g.

AN OPAL AND DIAMOND RING in 18ct yellow gold, set with a cabochon opal in a border of single cut diamonds, stamped 18ct, size M / 6, 2.5g.

AN ANTIQUE OPAL AND RUBY RING in yellow gold, set with a pear shaped cabochon opal within a border of cushion cut rubies, no assay marks, size O / 7, 3.2g.

A VINTAGE BLACK OPAL DRESS RING in yellow gold, set with a round cabochon opal, full British hallmarks for London 1974, size O / 7.25, 5.5g. 

AN OPAL AND DIAMOND RING in yellow gold, set with an oval cabochon opal doublet within a border of single cut diamonds, no assay marks, size Q / 8, 5.3g.

AN OPAL AND EMERALD RING in 9ct yellow gold, set with an oval cabochon opal triplet in a border of round cut emeralds, full British hallmarks for 9ct gold, size N / 7, 3.6g.

AN OPAL FULL ETERNITY RING in 14ct yellow gold, set all around with a row of round cabochon opals, stamped 14k, size T1/2 / 9.75, 1.2g.

OPAL AND DIAMOND RING in 18ct yellow gold, set with a cushion-shaped cabochon opal in a border of round cut diamonds, with further round cut diamonds to the shank, unmarked, size M / 6, 4.5g.

AN OPAL AND DIAMOND CLUSTER DRESS RING in yellow gold and silver, set with an oval cabochon opal within a border of old cut diamonds, no assay marks, size N / 6.5, 4.6g.

VINTAGE OPAL, EMERALD AND WHITE GEMSTONE RING in yellow gold, in cluster form, set with a cabochon opal in a border of step cut emeralds and round cut white gemstones, unmarked, size M / 6, 3.0g.

AN ANTIQUE OPAL AND DIAMOND RING in 18ct yellow gold, set with two cabochon cut opals, accented by old mine cut diamonds, to stylised shoulders, stamped 18CT, size O / 7.25, 2.6g.

NO RESERVE - A VINTAGE PEARL, OPAL, TURQUOISE, SAPPHIRE AND GARNET RING in 14ct yellow gold, set with a pearl in a border of opals, turquoise, sapphires and garnets, stamped 14K, size N / 6.5, 4.7g.

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.

AN ANTIQUE OPAL AND DIAMOND DRESS RING, 19TH CENTURY in 18ct yellow gold, set with a central round cabochon opal between two kite shaped cabochon opals, the central opal within a border of old cut dia

Mens opal and diamond 18K yellow gold ring, central opal cabochon, channel set round brilliant diamond rectangular border, marked size: 9.5 total weight: 32.9 Provenance: Property from a San Antonio

AN OPAL, DIAMOND AND SAPPHIRE CLUSTER RING in yellow gold, set with a round cut sapphire in a border of round cut diamonds and cabochon opals, marked indistinctly, tests as yellow gold, size M / 6, 4.

AN ANTIQUE OPAL AND DIAMOND RING in yellow gold, set with three cabochon opals punctuated by pairs of old cut diamonds, partial British hallmarks, size R1/2 / 9, 3.8g.

A VINTAGE OPAL AND DIAMOND RING in yellow gold, set with three cabochon opals punctuated by pairs of single cut diamonds, no assay marks, size M / 6, 2.9g.

ANTIQUE OPAL RING in 18ct yellow gold, set with five graduated cabochon opals, British Hallmarks for 18ct yellow gold, size O / 7, 3.2g.

AN OPAL BRACELET in 14ct yellow gold, set with seven round cabochon opals, stamped 585, 18.7cm, 1.4g.

AN OPAL DRESS RING in yellow gold, set with an oval cabochon opal weighing 3.05 carats, no assay marks, size N / 6.75, 4.2g.

AN OPAL DRESS RING in yellow gold, set with an oval cabochon opal to a bifurcated band, unmarked, size N / 6.75, 1.6g.

AN ANTIQUE OPAL AND DIAMOND RING in 18ct yellow gold, set with three cabochon opals punctuated by pairs of old cut diamonds, stamped 18ct, size N / 6.75, 4.2g.