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A 9ct yellow & white gold Triplet opal brooch, one round triplet opal, with a white gold frame and yellow gold bar brooch., Wt 5.3grams

Opal pendant, oval doublet with light Chinese writing pattern, bezel set in 9ct yellow gold, with both bail and brooch fittings, stamped '9ct, approx. Weight 9.6 grams

An opal set gold brooch, 18ct yellow gold, made as a fan shaped brooch of peacock inspiration, detailed by a curved arrangement of nine heart shaped solid crystal opals of strong colour and graduated form, the central of largest size, claw set, edged in un

An Australian gold mounted opal chip glass tube brooch, unmarked, 5.7 cm long, in fitted blue velvet marked William Dunkling, 316/7 Bourke Street, Melbourne

An 18ct gold opal and diamond bar brooch, centring a 10 x 7.5mm fine crystal opal adjacent to crescent mounts set with single cut diamonds, length 58mm, wt. 4.7g.

Vintage gold & solid opal brooch marked 15ct, weight: 4.37 grams (opal has small crack)

A diamond, pearl and opal brooch, of ribbon design, set with a solid opal cabochon, a button pearl and six round brilliant cut diamonds of known weight 0.19 carat. 18ct yellow gold. Weight 9.22 grams. Length 52mm

Vintage 9ct solid opal bar brooch, weight: approx 2.0 grams

9ct yellow gold opal doublet brooch. Oval opal in yellow gold frame. Original invoice dated 1965 available. Wt. 7g

Edw yellow gold opal doublet brooch. Brooch with suspended oval opal doublet set drop. Wt. 3.4g

Diamond, opal and enamel brooch/pendant, 14ct yellow gold, of openwork cartouche embellished with black enamel, centring an opal cabochon, featuring seven round brilliant-cut diamonds, stamped '14k, approx. Weight 16.3 grams

A unique light opal, diamond and ruby brooch in the form of a swan, pierced neck, ruby set eye, light opal body with good play-of-colour surrounded by approx 0.40cts of diamonds; 18ct white gold. Made by Prouds Jewellers c.1930. Safety chain attachment. We

18ct gold, solid opal and diamond bar brooch, weight: approx 3.9 grams

Arts & Crafts silver opal brooch, a circular silver wire brooch set with three black oval, opal doublets between silver leaves with a round, cabochon deep blue opal doublet in the centre

Vintage gold plated brooch with opal set beetle one stone missing on end of brooch, weight approx 1.5 grams

Gold and opal brooch, William Drummond & Co., Melbourne, 1963, centring an opal claw-set in an 18ct gold open work scalloped surround decorated with foliate motifs, approximately 30 x 25mm. Accompanied by Wm. Drummond & Co. working drawing, quotati

Impressive 18ct yellow gold, opal and pearl brooch, weight approx 23.9 grams, size: 7.5 by 5.5cm

An opal and seed pearl brooch, the oval opal surrounded by a row of seed pearls, mounted in 18ct gold.

An antique Australian opal and diamond pendant/brooch by Forster, of starfish design, centrally set with an opal cut en cabochon, each free form arm set with a row of graduated old European cut diamonds totallng 6.30cts, signed Forster, mounted in 18ct gol

An antique opal and diamond brooch, centrally set with a free form polished boulder opal in a pierced foliate frame set with mixed cut diamonds, mounted in platinum.

An early Australian antique opal specimen brooch with rose gold end caps, total weight 6.1grams, in antique box.

Early 9ct yellow gold ruby, opal & diamond brooch. Crescent shape set with 13 opals;13 diamonds; & 3 rubies set to bar of brooch. Provenance: Estate Australian collector, weight 6.8g

An opal and diamond bar brooch, the oval solid black opal cabochon set either side with three diamonds. 18ct yellow gold. Weight 5 grams. Length 6 cm.

18ct gold, opal and diamond sunburst brooch/pendant, Forster, Melbourne, early 20th century Centring a claw-set opal weighing approximately 4.25 carats surrounded by a cluster of old European-cut diamonds, the rays similarly set with graduated diamonds, th

An opal doublet bar brooch, with safety chain; 9ct yellow gold. Weight 2.4g.

An Arts & Crafts opal brooch attributed to Rhoda Wager, the open circular brooch set with four opal doublets within a floral and foliate frame in sterling silver highlighted with gold accents

An Australian opal brooch, the oval solid white opal cut en cabochon, set in a wirework frame with leaf decoration, in 18ct gold

An opal, ruby and diamond brooch, modelled as an insect, the body set with solid white opal and rubies, the wings set with diamonds and the eyes and antenna set with sapphire and emerald, in 14ct gold

A gold and silver opal brooch, bow design applied with two tone 9ct gold floral features and set with a 17 x 10mm black opal doublet. Size 60 x 40mm

An opal and sapphire set brooch/pendant, 9ct rose gold and silver, Edwardian, crafted as a lovely round brooch panel of domed form, pierced throughout and set with a central and outer frame of small round cabochon crystal opals, connected by smaller white

An antique opal and diamond brooch, 15ct yellow gold, Victorian, made as a marquise shaped panel brooch, centrally set with a solid cabochon marquise shaped piece of black crystal opal, large blocked spectral colours throughout of green and blue, claw set,

A striking citrine set brooch, 16ct yellow gold, made as a retro styled large bar brooch of polished gold with undulating profile, centrally set with a large oval citrine of golden yellow gold, bezel set in an opal backed mount, fitted with pin to reverse.

Silver gilt and opal brooch together with a scorpion brooch

Two silver and gold plated brooches, one blue stone and one opal triplet.