AN OPAL AND DIAMOND CLUSTER RING set with an oval cabochon opal in a cluster of round cut diamonds,

An opal and diamond cluster ring claw-set with an oval cabochon opal, in a border of old round-cut diamonds, unmarked(Ring size: U)

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)

An opal and diamond cluster ring claw-set with an oval opal cabochon, in a single border of ten round brilliant-cut diamonds, indistinctly marked(Ring size: Q/R)

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 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.

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 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 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.

comprising a cluster ring set with 3 oval opals and 5 round brilliant-cut diamonds, a pendant set with nine navette-shaped opals, and a pair of clip earrings set with oval-shaped opals measuring appro

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.

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.

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 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.

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 CLUSTER RING set with a cabochon opal in a cluster of old cut diamonds, size M / 6, 2.9g.

14K OPAL & DIAMOND RING set with an oval cabochon cut opal approx. 9.2x7.3mm, surrounded by 16 round brilliant cut diamonds approx. 0.34 carats (According to Estate Appraisal: G-H color, SI2 clarity),

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.

18KYG Black Opal and Diamond Ring size 11, bezel set oval cabochon black opal doublet approx. 13.0mm x 8.5mm, 10 prong set mixed sized round brilliant cut diamonds approx. .30cttw., stamped and tested

14kt white and rose gold opal and diamond ring featuring a prong set oval cabochon cut opal weighing approx. 0.92ct. Surrounded by a halo of prong set round brilliant cut diamonds weighing approx. 0.2

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 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. 

Large 14kt yellow gold opal & diamond ring. The ring has a tall design an features six (6), prong set, oval cabochon opals surrounding one (1), prong set, round single cut diamond. The ring has an ope

A BURMA NO HEAT CABOCHON SAPPHIRE AND DIAMOND CLUSTER RING, set with an oval cabochon sapphire of 16.06 carats surrounded by round cut diamonds, size O / 7, 19.2g. Accompanied by a gemmological report