A BLACK OPAL AND DIAMOND PENDANT in 18ct white gold, set with a central pear cabochon black opal

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

A BLACK OPAL AND DIAMOND PENDANT in 18ct yellow gold, set with a cabochon black opal of 3.40 carats, the bail accented by three round cut diamonds, stamped 18K, 2.2cm, 1.4g.

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

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.

Crafted of 14k gold. Elegant drop design with pear shaped tanzanite gemstone surrounded by a halo of channel set round brilliant diamonds. Pendant is suspended from three round cabochon cut black opal

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 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.

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

Fourteen-Karat Yellow Gold, Black Opal and Diamond Pendant, in a modern design and bezel-set with an oval cabochon black opal, with an approximate weight of 5.75 carats, and two round brilliant-cut di

The pear-shaped opal, 15.40 x 10.54 mm, within a nest of RBC diamond, approx. .33 ct. TW. and bright gold wire, on braided chain. 14k. 1 1/2" x 3/4", 18". 4.4 dwt.

18k white gold diamond and black opal doublet pendant set with a black opal doublet measuring approx. 11mm x 8.5mm, and 45 round brilliant cut diamonds, approx .45 carat total weight, measuring approx

Oval black opal weighing approx 1 carat measuring 10mm x 7mm and small round diamond set in 14K white gold pendant measuring approx 1 1/8" long with 18" 14K white gold chain, weighs 2.1dwt No Reserve

A DIAMOND, ONYX AND EMERALD PANTHER BRACELET in 18ct white gold, the panther set with round cut diamonds, cabochon onyx and pear cut emerald eyes, on a black strap, the clasp set with further round cu

14 Kt. yellow gold bracelet consisting of eight slides, including a fleur-de-lis shape slide with black enamel center multi-prong set with one pear shape cabochon cut White Opal, approximately 0.35 ct

GIA certified 5.51 G boulder opal pendant hung on an 18K yellow gold black diamond beaded necklace. Center stone set in a white + yellow metal pendant w/numerous near colorless round brilliants. Measu

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 black opal, diamond and eighteen karat gold ringdesigned as a pear cabochon black opal, measuring approximately 9.75 x 7.50 x 3.90 mm, framed by round brilliant-cut diamonds. 2.7 dwt; size: 10 1/2

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,

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

White Gold, Black Opal and Diamond Pendant with Chain and Ring 14 kt., 2 oval opals ap. 51.75 and 9.70 cts., round diamonds ap. 4.65 cts., signed ADG, ap. 33 dwts. gross. Length 18 inches. Size 7. C P

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

AIG Certified 14K yellow gold cast and assembled natural ethiopian fire opal and diamond pendant with 14K yellow gold cable chain. Bezel set pear Cabochon cut opal with intertwining diamond accented b

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