AN OPAL AND DIAMOND CLUSTER RING in 18ct yellow gold, set with an oval cabochon opal in a cluster of

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 CLUSTER RING in 18ct yellow gold and platinum, set with a cabochon opal in a cluster of rose cut diamonds, stamped 18CT & PLATINUM, size M / 6.25, 2.7g. 

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.

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.

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

Two 18ct gold diamond and gem-set rings. To include an oval opal cabochon single-stone ring with brilliant-cut diamond stepped sides, together with a ruby and diamond cluster ring. Estimated total dia

AN OPAL AND DIAMOND THREE STONE RING in 18ct yellow gold, set with an oval cabochon opal between two round brilliant cut diamonds, stamped 750, size K1/2 / 5.5, 4.7g.

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

AN ANTIQUE OPAL AND DIAMOND RING in 18ct yellow gold, set with three graduated oval opal cabochons, punctuated by pairs of old mine cut diamonds, British hallmarks for Birmingham, 1890, size S / 9, 5.

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.

AN ANTIQUE OPAL AND DIAMOND DRESS RING in 18ct yellow gold, set with a trio of graduated oval cabochon opals, accented by pairs of old European brilliant cut diamonds, full British hallmarks (partly o

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

OPAL AND DIAMOND CLUSTER RING, in 18 ct. gold. Set with an oval cabochon cut opal with nice color play, surrounded with diamonds. Size N. 3.1 grams.

An opal and diamond-set cluster ring, in 18ct yellow gold, size J1/2, together with a 9ct yellow gold engine-turned toothpick; 8.8 grams

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 18ct gold opal and diamond cluster ring. The oval opal cabochon, within a single-cut diamond surround, to the tapered band. Estimated total diamond weight 0.35ct. Hallmarks for London, 1978. Ring s

Ladies' retro 14 karat yellow gold ring set with a cluster of oval shaped Opal cabochons. The ring shank with pierced design. Ring size 5-1/2. Weighs approx. 4.8 dwt (7.4 grams). Shipping to be $20 +

An opal and diamond cluster ring claw-set with an oval cabochon opal in a border of round-cut diamonds, to a plain band, stamped 18ct(Ring size: K)

A VICTORIAN STYLE 14K YELLOW GOLD AND OPAL RING, FIRST HALF 20TH CENTURY, the cluster ring centers a ten prong set oval cabochon opal measuring approximately 7.2mm x 4.9mm surrounded by a halo of ten

3 ANTIQUE OPAL AND GOLD RINGS: 1.) Romany (Hans Stern Romany)14K Opal and Diamond Cluster Ring, in shades of blue and green, fur oval opal cabochons surround a prong set center diamond, size 8,stamped

cluster brooch set with one oval cabochon cut White Opal, approximately 3.59 carats, enhanced with two pear shape cabochon cut White Opals, approximate total weight 1.09 carats, accented with 13 full

A group of Early 20th Century opal and fourteen karat gold jewelryincluding a pair of floriform oval jelly opal cluster stud earrings; two rings set with oval opal cabochons or old mine-cut diamonds.

18k Yellow Gold, Semi-Precious Gemstone and Diamond Rings (2) rings including one having an oval cut dark opal surrounded by round cut cluster set diamonds; and the other having a hawk eye surrounded

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.