An opal and old-cut diamond ring.

An early 20th century gold, opal cabochon and old-cut diamond cluster ring, estimated total diamond weight 0.80ct, I-J colour, SI clarity, opal measures approximately 13.5 by 11 by 3.9mm, ring size S,

A black opal, old and single-cut diamond pierced geometric ring.Signed JoAq. Engraved 850 Plat. Ring size N. 6.1gms.

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)

Antique Oval Cabochon Opal, Old European Cut Diamond and 14 Karat Yellow Gold Ring. Opal with good play of multi colors. Ring size 7-1/2. Approx. weight: 6.56 grams. Condition: Very good antique condi

An Edwardian 18ct gold graduated opal three-stone ring, with old-cut diamond spacers. Estimated total diamond weight 0.15ct.Hallmarks for Birmingham, 1905. Ring size O1/2. 5.3gms.

An Edwardian 18ct gold opal three-stone ring, with old-cut diamond spacers. Estimated total diamond weight 0.20ct. Hallmarks for Birmingham, 1903, partially indistinct. Ring size N. 3.8gms.

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.

AN ANTIQUE OPAL AND DIAMOND RING, 19TH CENTURY in 18ct yellow gold, set with two cabochon opals and old cut diamonds, British hallmarks for Chester, 1898, size O / 7, 2.8g.

ANTIQUE OPAL AND DIAMOND RING set with three graduated oval cabochon opals and old cut diamonds, size M / 6, 6.0g.

An early 20th century 18ct gold diamond and opal dress ring. The oval-shape opal cabochon line, with old-cut diamond spacers. Hallmarks for Birmingham, 1916. Ring size N1/2. Weight 3.5gms. Overall con

NO RESERVE - AN ANTIQUE OPAL AND DIAMOND DRESS RING, Made in yellow gold, Three graduated oval cabochon opals, Old European brilliant cut diamonds (one replaced with a round brilliant cut diamond), No

A LATE 19TH CENTURY OPAL AND DIAMOND RING three graduated oval opals spaced by old-cut diamonds, to carved shoulders. Estimated total diamond weight 0.30ct, marked ‘18CT’, ring size M, 4.0

ANTIQUE GOLD OPAL AND DIAMOND RING, the cabochon cut opal surrounded by old cut diamonds totaling approx. 0.28 ct. Size L 1/2. 4.1 grams.

An Edwardian 18ct gold opal and diamond ring. The oval-shape opal line, with old-cut diamond spacers and scrolling gallery. Estimated total diamond weight 0.15ct. Hallmarks for London, 1903. Ring size

AN OPAL AND DIAMOND DRESS RING in platinum, set with two cabochon opals and two old cut diamonds, the diamond both totalling 0.4-0.5 carats, stamped PT, size M / 6, 3.6g.

An early 20th century gold opal and diamond ring. The oval opal line, with old-cut diamond double spacers. Estimated total diamond weight 0.25ct. Ring size J1/2. Weight 3.9gms. Overall condition good.

A VINTAGE OPAL AND DIAMOND RING in 18ct yellow gold, set with a cabochon opal between two old cut diamonds, stamped 18ct, size L / 5.5, 3.6g.

An early 20th century gold, opal and diamond cluster ring. The heart-shape opal cabochon, with old-cut diamond surround. Estimated total diamond weight 0.45ct. Ring size N. Weight 3.6gms.

An opal three-stone and diamond ring. The graduated oval black opal cabochon line, with old-cut diamond double spacers and stylised foliate shoulders. Estimated total diamond weight 0.10ct. Ring size

AN ANTIQUE OPAL AND DIAMOND RING in 18ct yellow gold, set with two cabochon cut opals, accented by old mine cut diamonds, to stylised shoulders, stamped 18CT, size O / 7.25, 2.6g.

AN OPAL AND DIAMOND THREE STONE RING in 18ct yellow gold, set with an opal cabochon between two old cut diamonds, stamped 18, size G / 3, 2.3g.

An opal three-stone and diamond ring. The graduated circular opal cabochon line, with old-cut diamond spacers. Estimated total diamond weight 0.10ct. Ring size N. Weight 3.3gms.

An Opal & Diamond Ring. 14 karat yellow gold mounting contains one bezel set oval opal doublet, three Old Mine cut diamonds and four Old European cut diamonds Size: 6 Wt: 13.2 grams

An Edwardian opal and diamond ring. The graduated circular opal cabochon line, with old-cut diamond double spacers, to the scrolling sides and plain band. Hallmarks for Birmingham, 1908. Weight 2.6gms