A GOOD LARGE OPAL AND DIAMOND CRESCENT BROOCH set with

OPAL AND DIAMOND CRESCENT BROOCH. set with graduated opal cabochons, surrounded by diamonds. 2.9 cm diameter 5.1 grams

ANTIQUE BELLE EPOQUE OPAL AND DIAMOND BROOCH, Set with a large marquise shaped opal of approx. 28 x 9.7 mm. Surrounded with bright and lively diamonds. L. 4 cm. 10.1 grams.

Large oval 14K yellow gold brooch with hidden bail on back to convert to a pendant, set with large white opal cabochon and the foliate frame set with brilliant cut white diamonds, height 2", width 1.7

14K yellow gold ring featuring large oval boulder opal with very good blue and green play of color, 14 x 20mm, with 6 additional smaller diamonds set on the sdie of opal, sz 7.5, 7.2 grams

ED WIENER 18K Gold Hand Wrought Diamond Brooch Pendant Pin. Large sculptural modernist brooch with 5 faceted prong set diamonds and large set opal center stone. Mid century hand crafted studio jewelry

Large lady's opal and diamond ring. Large opal approx. 4-5 karats surrounded by 20 small diamonds set in a 14K white gold setting. In good condition. Approx. size is 6 1/2.

Large impressive Victorian diamond brooch made of 18K Gold integrated with silver (acid tested by the auction house) set with fine old mine cut diamonds in SI-VS quality and E-G colors (except for one

Spectacular Ladies 18K White Gold Ring set with 17 full-cut round diamonds, and a large singlet opal (8.5mm x 11mm). Ring Size 8. total weight 7.3 grams / 4.6 dwt. light use, clean good condition with

Ed Wiener (American, 1918-1991). Signed vintage designer gemstone brooch. A freeform Brutalist design with prong set round cut diamonds set around a large oval opal doublet with great play of color. C

14K Yellow Gold Ring, set with a large oval opal and six small round faceted diamonds, size 7 1/2, 6.0 dwt tw. Good condition.

Handmade 14K Yellow Gold Dinner Ring set with (1) large oval Australian opal surrounded by (9) round diamonds and (9) rubies, ca. 1970, size 7 1/2. Good condition.

AN ANTIQUE OPAL AND DIAMOND BROOCH, 19TH CENTURY in high carat yellow gold, designed as a crescent moon jewelled with graduated cabochon opals accented by old and rose cut diamonds, set to a plain bar

Vintage 14K yellow gold, sapphire, ruby and diamond crescent brooch, set with four round brilliant-cut diamonds; weighing a total of approx: 0.40 carats, color: H-I, clarity: SI1-SI2, eight round and

ANTIQUE RUBY AND DIAMOND CRESCENT BROOCH. set with rubies totalling approx. 1.26 ct. diamonds totalling approx. 0.15 ct. W 6 cm. 4.3 grams.

TURQUOISE AND DIAMOND CRESCENT BROOCH. set with vibrant turquoise and bright lively diamonds. W 5.2 cm. 4 grams.

VICTORIAN DIAMOND CRESCENT BROOCH, set with diamonds graduating in size. 2.2 grams.

ANTIQUE OPAL AND DIAMOND CRESCENT BROOCH,High carat gold.Opals well matched with nice play of colour including reds.Diam. 2.7 cm.5 grams.

A late 19th century diamond closed crescent brooch, set with a graduated curve of round old brilliant cut diamonds tapering to old single cut diamonds, millegrain set to a low gallery, unmarked white

RUBY AND DIAMOND CRESCENT BROOCH, Alternately set with a ruby and diamond. Rubies totalling approx. 0.76 ct. Diamonds totalling approx. 0.40 ct. W. 2.7 cm. 6.2 grams.

RUBY AND DIAMOND CRESCENT BROOCH, Alternately set with a ruby and diamond. Rubies totalling approx. 0.76 ct. Diamonds totalling approx. 0.40 ct. W. 2.7 cm. 6.2 grams.

Large Queen Bee diamond brooch set in 18 karat yellow gold, custom designed by TURI. Stamped 18k T.U.R.I. Round brilliant 3 1/2-4 karats full cut diamonds set in a 18k yellow gold setting. Weight: 11.

DIAMOND-SET CRESCENT BAR BROOCH Set throughout with old brilliant-cut diamonds, diamonds approx. 0.76cts total, length 3.9cm For further information on this lot please visit Bonhams.com

An opal and diamond horseshoe brooch set throughout with opal cabochons and old round-cut diamonds, unmarked (Length: 3cm)

CARVED OPAL, SAPPHIRE, EMERALD AND DIAMOND CRESCENT BROOCH Containing five intricately carved transparent crystal opal flowers measuring approximately 9.50-13.00 mm wide, eight round brilliant cut dia