AN OPAL, ENAMEL, AND DIAMOND RING in 9ct gold, set with a round cabochon opal in a border of black

AN OPAL, ENAMEL, AND DIAMOND RING in 9ct gold, set with a round cabochon opal in a border of black enamel, accented by round brilliant cut diamonds, full British hallmarks, stamped 375, size O / 7, 2.

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

Antique Estate Victorian 14kt Gold Opal & Diamond Floral Motif Cluster Ring. Having textured gold beadwork around border. Set with cabochon opals and round diamonds. Ring size 4.25 can be resized.

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.

A FINE ART DECO BLACK OPAL AND DIAMOND RING in white gold, set with a pear shaped cabochon opal accented by round cut diamonds, no assay marks, size I / 4.5, 3.5g.

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.

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.

DIAMOND, OPAL AND ENAMEL RING Containing one round brilliant cut diamond, eight round cabochon opals and black enamel detail. Mounted in yellow gold. Ring size 6 3/4. Stamp: 14K. 8.10 dwt. Property fr

AN OPAL AND DIAMOND CLUSTER RING in 18ct white gold, set with a cabochon opal of 9.50 carats in a border of round brilliant cut diamonds, the band accented by further diamonds all totalling 0.65 carat

An Opal and Diamond Ring. 14 karat yellow gold ring contains one prong set oval cabochon opal which is aurrounded by ten prong set round diamonds, which are surrounded by a single band of black enamel

Seven enamel, opal, and gold band rings The joined bands of floral design, set with cabochon opals, single and round brilliant-cut diamonds Yellow and pink gold Ring size 6; Gross weight 6.2 dwts Prov

A BLACK OPAL AND DIAMOND PENDANT AND CHAIN in 18ct yellow gold, the pendant set with a pear shaped cabochon black opal in a border of round brilliant cut diamonds, accented by a further round brillian

Victorian Diamond, opal, and enamel bangle bracelet Of blue and black enamel foliate scroll design, set with a cabochon opal and old mine, rose, and round brilliant-cut diamonds Yellow gold Inner circ

AN OPAL AND DIAMOND RING in 9ct yellow gold, set with an oval cabochon opal and old cut diamond of approximately 0.27 carats, full British hallmarks for 9ct gold Birmingham 1988, size N / 7, 5.8g.

A TURQUOISE AND DIAMOND RING in 9ct yellow gold, set with a round cabochon turquoise in a border of round brilliant cut diamonds, full British hallmarks for 9ct gold, size O / 7, 2.3g.

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 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.

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 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.

A FIRE OPAL AND DIAMOND RING in 9ct yellow gold, set with an oval cut fire opal, accented by round brilliant cut diamonds, full British hallmarks for 9ct gold, size P / 7, 3.2g.

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.

Antique Victorian Opal, diamond, enamel, and gold brooch Set with cabochon opals and rose-cut diamonds, in a swirling surround of black enamel; 1880s Yellow gold 2.75 x 1.25 in; Gross weight 12.0 dwts

AN OPAL AND DIAMOND RING in 18ct yellow gold, set with a round cut diamond within a cluster of four cabochon opals, no assay marks, size N / 6.5, 5.4g.