An opal dress ring. Designed as a boulder opal collet,

A yellow metal and boulder opal dress ring; the oblique shaped rectangular plaque within a textured mount and set above a textured fold-formed shank. Italian hallmarked '750' and signed J.L. Ring head

A 9ct gold ruby and opal dress ring. Designed as a circular-shape ruby and circular opal cabochon panel. Hallmarks for London, 1976. Ring size M. Weight 6gms.

GRIMA: BOULDER OPAL AND DIAMOND DRESS RING, 1977 The oval boulder opal in a pierced mount of textured wire with brilliant-cut diamond accents, mounted in 18 carat gold, signed Grima, workshop mark HJC

A diamond and opal dress ring. The marquise-shape textured panel, with old-cut diamond and vari-shape opal cabochon collets, to the bifurcated sides. One opal cracked. Estimated total diamond weight 1

OPAL DRESS RING, set with an opal, entwined in branches and leafs, sprouting from the shoulders. Size. O. 11.4 grams.

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 18 CARAT GOLD BOULDER OPAL RING, a round opal in a bezel setting to a tapering shank. Hallmarked Birmingham 1899, ring size O, 5.6 grams

AN OPAL DRESS RING, the oval-shaped opal within multiple claws to a plain polished gold hoop, mounted in 18K gold, with engraving 'Mercy', with maker's mark 'KWR', ring size L

Jewelry: Ladies Estate Vintage 14k Gold Boulder Opal Ring Metal: 14K yellow gold Gram Weight: 8.4 Ring Size: 7 Dimensions: 18mm x 14mm profile Please note that this lot has a confidential reserve. Whe

AN OPAL DRESS RING in yellow gold, set with an oval cabochon opal weighing 3.05 carats, no assay marks, size N / 6.75, 4.2g.

Boulder opal ring GG 750/000 Naturalistic single piece with a boulder opal 25 x 9,5 mm, RG 52, W marked, 13,6 g

14kt Yellow Gold and boulder Opal ring in filigree setting.

A BOULDER OPAL RING. 14 karat yellow gold mounting contains one prong set oval boulder opal cabochon. Size: 8 1/2 Wt: 17.6 grams

set with a large oval opal surrounded by textured gold surround, a/f, total weight 11.73gm

NO RESERVE - AN OPAL DRESS RING, Made in 9 carat yellow gold, Oval opal doublet, 13.6mm x 9.8mm, Stamped 9ct, Size M1/2 / 6.5, Weight 2.4 grams

9ct gold opal dress ring together with 9ct hallmarked amethyst set ring: Sizes V & S appx. Gross weight 9g. (2)

METAL: 14k Gold. MEASUREMENTS: Ring size 5.25, top is 24mm x 14mm. GEMSTONES: Boulder opal. TESTED: 14k. WEIGHT: 3.4 grams.Gemstones have not been graded for color and clarity ,and tested for clarity

AN OPAL DRESS RING in yellow gold, the oval cabochon opal set to a plain band, unmarked, K / 5, 1.05g.

14k 3 grams Size 6.5

AN OPAL DRESS RING in yellow gold, set with an oval cabochon opal to a bifurcated band, unmarked, size N / 6.75, 1.6g.

Here is a very nice men\'s natural boulder opal ring set in 18K yellow gold. This one has been around for awhile, probably since the 40\'s.Stunning oval shape boulder opal displays a beautiful green p

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

Platinum 4.5Ct Boulder Opal & Diamond Ring, Size 4 3/4, TW:8.2 Grams.

Vintage Blue Doublet Boulder Opal Cocktail Ring 9K Yellow Gold, 4.48 Grams This is a gorgeous statement ring! Let us know if you have any questions. Gemstones: 1 blue doublet boulder opal, 15 mm x 11