A BLACK OPAL AND DIAMOND DRESS RING set with a cushion

A 14k yellow gold cluster ring, set with an oval cabochon black opal, backed doublet, surrounded by a row of small diamonds, marked 14k, size 5 1/2. L. of opal: 13.5mm

A platinum dress ring, set with a central black opal doublet surrounded by small diamonds, marked platinum and Birks, size 4 3/4.

A CEYLON NO HEAT SAPPHIRE AND DIAMOND DRESS RING set with a cushion cut blue sapphire of 4.10 carats, within a rectangular border set with old cut and baguette cut diamonds, the diamonds all totalling

A TANZANITE, PINK TOURMALINE AND DIAMOND DRESS RING set with a cushion shaped tanzanite of 11.28 carats, accented by marquise cut pink tourmalines and round brilliant cut diamonds, no assay marks, siz

A SAPPHIRE AND DIAMOND DRESS RING set with a cushion cut blue sapphire of approximately 5.02 carats, accented by rows of round brilliant cut diamonds, with further round brilliant cut diamonds to the

AN EMERALD AND DIAMOND DRESS RING set with a cushion cut emerald of 2.19 carats, between stepped shoulders set with round brilliant cut diamonds, no assay marks, size M / 6, 5.3g.

A BLUE ZIRCON AND DIAMOND DRESS RING set with a cushion cut blue zircon of 5.76 carats, accented to the openwork band with single cut diamonds, no assay marks, size M / 6, 6.6g.

A BURMA NO HEAT RUBY AND DIAMOND DRESS RING set with a cushion cut ruby of 1.20 carats, within a bombe style mount set allover with rose cut diamonds, unmarked, size K / 5.25, 6.1g. The gemological pr

A VINTAGE BLACK OPAL DRESS RING in yellow gold, set with a round cabochon opal, full British hallmarks for London 1974, size O / 7.25, 5.5g. 

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 ANTIQUE SAPPHIRE AND DIAMOND DRESS RING set with a central cushion cut sapphire of 2.86 carats with a double row diamond border with stylised edge. Ring size N / 6.75.

A MINT GREEN TOURMALINE AND DIAMOND DRESS RING in platinum, set with a cushion cut tourmaline of 5.55 carats, the border set with round brilliant cut diamonds, the shoulders set with further round bri

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.

1970's Platinum Black Opal & Diamond Ring. The ring is centrally set with a large oval cabochon cut black peacock opal. It exhibits a fine blue to green harlequin play of color. It weighs approx. 5.99

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

A black opal, ruby, green garnet and marquise-shape diamond dress ring, with seahorse supports. Interchangeable with pendant mount.Estimated total diamond weight 0.20ct.Approximate ring size S. Length

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.

A DIAMOND DRESS RING The circular plaque set with old cushion-shaped diamonds throughout, to a gallery of foliate and scrolling detailing, mounted in gold, diamonds approximately 1.40ct total, ring si

OPAL AND DIAMOND DRESS RING, in 18-ct gold. Set with 3 opals, flanked with 4 diamonds. Size N. 4.7 grams.

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

OPAL AND DIAMOND DRESS RING, in 18 ct. gold. Set with 3 oval cabochon cut opals, accentuated with 4 diamonds. The side of the head and shoulders with relief scrolling design. Size N. 7.8 grams.

Lady's 14k Black Opal & Diamond Ring Size 5. Includes a prong set black opal oval cabochon measuring 9.42x5.7x3.8mm (1.15ct). It is slightly bluish green with a moderate amount of crazing. It is flank

-NO RESERVE- OPAL AND DIAMOND DRESS RING, in 18 ct. gold. Set with 3 oval cabochon cut opals, accentuated with 4 diamonds. Size M 1/2. 4.4 grams.

NO RESERVE, OPAL AND DIAMOND DRESS RING, in 18 ct. gold. Set with 3 oval cabochon cut opals, accentuated with 4 diamonds. Size M 1/2. 4.4 grams.