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9ct gold opal brooch and ring, ring featuring oval opal doublet (small chip), size U, brooch with oval opal triplet, total wt 8.9g.

9ct gold pansy brooch set with black opal, (meaning thoughts), weight: 1.79 grams

An antique Australian opal and diamond brooch/pendant, the pierced oval plaque set with solid white opals cut en cabochon and interspaced with old European cut diamonds, with detachable bale and brooch pin fitting, mounted in 15ct gold, boxed.

An Australian opal brooch, the octagonal panel inlaid with solid opal depicting a landscape scene, mounted in 18ct gold, signed William Drummond.

9ct yellow gold, pearl and opal crescent brooch, weight: approx 2.2 grams

A Victorian opal bar brooch, an oval crystal opal measuring 12.6 x 9mm in a rope twist border, 18ct gold. M&M, Birmingham, 1853. Weight 5.9g.

18ct yellow gold and opal brooch, weight: approx 9.74 grams, tested as 18ct

A retro opal and diamond set brooch/pendant. 18ct yellow gold, circa: 1960's, made as an abstract triangular formed brooch with central solid crystal opal of varied colour, bezel set in an open backed mount, framed by ten tiny brilliant cut diamonds, b

Edwardian 9ct nine stone opal scorpion brooch with sapphire eyes

Edwardian 8ct gold, opal and seed pearl pendant, or brooch, weight approx 4.2 grams, size approx 4.5 cm including bale

14ct white gold, opal and diamond brooch, Centring a claw-set cushion-shaped opal measuring approximately 18.00 x 14.00 x 8.00mm framed by a line of brilliant-cut diamonds flanked by a foliate motif embellished with diamonds, the diamonds together weighing

An opal and diamond cocktail brooch, the stylised foliage set with an oval solid white opal cut en cabochon, offset by twenty eight round brilliant cut diamonds totalling 1.23cts, mounted in 14ct white and yellow gold

14ct yellow gold and solid opal brooch, weight: approx 7.61 grams

New Zealand 15ct opal and diamond bar brooch large oval cabochon translucent milk opal with four old brilliant cut diamonds surrounding on scrolling frame. Made by Denton Jewellers, Wellington opal size 26 x 12 x 3.2mm Provenance: Being of direct family d

18ct opal and diamond bar brooch central cluster of oval milk opal and 20 diamonds

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

Edwardian 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