A FINE OPAL AND DIAMOND BROOCH in 18ct white gold, in scrolling design, set with a central cabochon

A FINE OPAL AND DIAMOND PENDANT NECKLACE in 18ct white gold, set with a cabochon opal of 9.40 carats accented by round cut diamonds, stamped Au750, pendant 3.7cm, chain 45.0cm, 5.4g.

AN ANTIQUE OPAL AND DIAMOND BAR BROOCH in 18ct gold, set with a central oval cabochon opal between two old cut diamonds, with further rose cut diamonds to the bar, French import marks for 18ct gold, 3

10k white and yellow gold pin brooch, set with a central round shaped cabochon opal, approximate total weight of opal 1.57ct, flanked by four old European cut diamonds, approximate total weight of dia

AN ANTIQUE OPAL AND DIAMOND BROOCH in yellow gold and silver, set with a central cabochon opal within a scrolling openwork mount set with old cut diamonds, the diamonds all totalling 5.3-5.5 carats, n

Vintage butterfly brooch with two opal wings set on 14k white gold, 14k yellow gold and silver. Edged with small diamonds. Central body in white gold with our round diamonds and two ruby cabochon eyes

A VINTAGE DIAMOND BROOCH in 18ct white gold, the scrolling body set with old cut diamonds all totalling 4.4-4.7 carats, later British hallmarks, 4.3cm, 11.9g.

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 CLUSTER RING in 18ct white gold, set with a cabochon opal in a cluster of round cut diamonds, British hallmarks, size H / 4, 5.2g.

A PEARL AND DIAMOND BROOCH in 18ct yellow and white gold, the Art Nouveau design set with old cut and rose cut diamonds, suspending a drop set with a pearl of 12.6mm, French assay marks, 4.0cm, 8.4g.

A PAIR OF OPAL AND DIAMOND CLUSTER EARRINGS in 18ct white gold, each set with a cabochon opal in a cluster of round brilliant cut diamonds, suspending a further opal and diamond cluster, stamped 750,

A PAIR OF OPAL DOUBLET AND DIAMOND DROP EARRINGS in 18ct white gold, each set with a cabochon opal doublet within a border of round cut diamonds, accented by single cut diamonds in fleur de lis motifs

AN OPAL AND DIAMOND PENDANT NECKLACE in 18ct white gold, set with a pear shaped cabochon opal in a border of round brilliant cut diamonds, suspended from a chain, full British hallmarks, pendant 2.3cm

AN OPAL AND DIAMOND DRESS RING in 18ct white gold, set with a pear shaped cabochon opal within a twisted mount, accented by round cut diamonds, stamped 18kt, size Q / 8, 8.6g.

Art Nouveau Opal, peridot, and gold brooch Of scrolling design, set with a cabochon opal and circular-cut peridots; 1910s 15k yellow gold 1 in; Gross weight 2.1 dwts This work will shi

AN EMERALD BEAD AND DIAMOND NECKLACE in 18ct white gold, comprising seven rows of graduated faceted emerald beads, the clasp in scrolling design set with round cut diamonds, stamped 18k 750, 39.0cm, 4

AN OPAL AND DIAMOND DRESS RING in 18ct yellow and white gold, set with an oval cabochon opal accented by round brilliant and princess cut diamonds, the diamonds all totalling 1.2-1.4 carats, British h

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 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

AN OPAL AND DIAMOND PENDANT AND CHAIN, ASPREY & CO in 18ct white gold, set with an elongated oval cabochon opal of 4.85 carats, suspended below four graduated chevron motifs set with round cut diamond

An 18ct gold opal and diamond novelty brooch, and an 18ct gold gem-set cluster ring. The brooch designed as a pair of sunglasses with oval opal cabochon lenses and brilliant-cut diamond bridge, the ri

A 9ct white gold bar brooch set with central oval opal cabochon. The opal approx. 3/4" long, the brooch 2" wide overall.

ANTIQUE OPAL, DIAMOND AND ENAMEL BROOCH, 19TH CENTURY in high carat yellow gold, in open heart design set with a moon cabochon opal, old and rose cut diamonds totalling approximately 10.00 carats and

A VINTAGE DIAMOND BROOCH, DAVID SHACKMAN & SONS 1975 in 18ct yellow and white gold, formed of naturalistic gold batons accented by crescent moon designs, set with round cut diamonds, maker's mark DS&S

In a textured cut-out design set with a treated oval opal cabochon, L. 14mm, with a bar of three single cut diamonds on one side. Testing as 14k. Ring size approx. 5, 8.8g.