opal - brooches

An Australian opal sword pin by Hermann Simonsen Pty Ltd, Swanston Street, Melbourne, circa 1910, set with solid white opal, marked 'Ssquare & Ccompass / 15 / Ffleece', 15 carat yellow gold; and a paste Southern cross, Australian map brooch (2)

An Australian opal and gold brooch, by Timothy T Jones, George Street Sydney, circa 1880, set with an oval Queensland boulder opal surrounded by beading and engraving, marked 'T.T./& Son', yellow gold. Provenance: Leonard Joel Auction, 28 Nov 1990 Referenc

An Australian opal and diamond brooch, by Henry Newman & Son, Elizabeth Street, Melbourne circa 1880, set with an oval solid white opal surrounded by ten rose-cut diamonds on a knife edge bar and diamond, set flowerhead terminals, marked 'H. Newman' yellow

An Australian opal diamond and paste bar brooch, by J.J. Williams, Charters Towers, circa 1880, set with a solid opal matrix surrounded by ten old mine cut diamonds on a double bar set with ten further diamonds and blue garnet topped doublets, twice marked

10ct yellow gold opal Triplet set brooch. Total weight 4.8gm

A 9ct gold opal brooch; spray design set with three crystal opals. Length 60mm. Weight 3.9g.

A 9ct gold opal brooch; set with a 12 x 10mm opal doublet. Length 60mm. Weight 4.2g.

An opal and diamond brooch, the solid oval-shaped black opal, weighing approximately 12.90 carats, surrounded by a border of brilliant-cut diamonds, diamonds approximately 1.60 carats total, width 3.2 cm

An opal brooch of simple bar design, set with a solid semi-black opal weighing approximately 9.00 carats, width 6.5 cm

Carved opal and 18ct gold cameo brooch. Central oval cameo, claw set within gold surround. Width 10.7g (total)

Edwardian 15ct yellow gold solid opal brooch. Central oval opal in seed and simulated pearl set frame. Some pearls missing. Width 3.9g

An opal pendant/brooch, the large freeform solid white opal claw set, with a foliate design bale in 9ct gold.

9ct mourning brooch set with enamel and opal, 9.7 grams

An opal bar brooch, the plain bar set with solid black Lightening Ridge opal cabochon measuring 10.7 x 5 x 2.1mm. 18ct yellow gold. Length 5 cm.

An opal and pearl brooch, the oval opal doublet surrounded by seed peals. 9ct yellow gold. Weight 10 grams. Length 3.5 cm. Width 2.5 cm.

Opal and fire opal insect brooch hallmarks for London

An opal brooch, the oval doublet set within a wide textured oval frame, in 18ct gold, signed W.N.T

An opal and diamond brooch, of triangular form, the solid opal set within a textured frame with claw set diamond detail, in 18ct gold

A pearl, diamond and opal brooch, of free form ribbon design, set with a 10.3mm South Sea pearl, a cabochon solid black opal of known weight 0.80 carat and six round brilliant-cut diamonds totalling 0.19 carat

A diamond and opal brooch, of abstract design, set with a free form boulder opal and twenty-four round brilliant-cut diamonds, estimated total diamond weight 1.44 carats

A diamond and opal brooch, of abstract triangular design, set with a free form boulder opal and forty-three round brilliant-cut diamonds, estimated total diamond weight 1.50 carats. 18ct yellow gold. Length 6.8 cm. Weight 41.83 grams

A bi-tone 18ct gold opal doublet and diamond set foliate brooch, estimated total diamond weight 0.05ct, approximately 55 x 35mm, 9.20gms.

An 18ct white gold opal brooch by Fairfax & Roberts set with an oval solid opal

An Art Deco opal and diamond brooch, of geometric design, the articulated diamond set drop suspending an opal doublet within a diamond border, all in platinum.

Opal and diamond brooch pendant, circa 1915, centring on a round cabochon opal weighing approximately 9.50 carats within an openwork frame highlighted by old European cut diamond set foliate motifs, mounted in 15ct gold and platinum.

A 9ct opal set bar brooch 9ct Southern cross bar brooch and a 9ct boomerang Southern cross bar brooch

A 9ct gold 'Australia Brooch' 9ct solid opal set bar brooch and rare South Australian 9ct 'Old Gum Tree' bar brooch

A 15ct gold opal brooch; 44 x 40mm heart shape white opal set in a decorative frame (unmarked tests 15ct). Wt. 19.8gm.

An opal and diamond brooch by J.M. Nadas, of abstract design set with a bolder opal cut en cabochon and a small round brilliant cut diamond, all in 18ct gold, with original box.

An antique opal butterfly brooch, the finely detailed butterfly in 15ct gold, having solid crystal opal set wings and body with red stone set eyes. N.B. Fracture to one wing and centre stone.

An antique opal and diamond brooch, the crescent design set with graduating oval solid crystal opals spaced by old European cut diamonds, all in 9ct gold.

An Edwardian opal melee bar brooch with engraved 9ct gold caps; nickel pin, gold safety chain. Length 5.9 cm

An opal and gold brooch, the oval solid black opal claw set in a scalloped gallery 15ct gold brooch

An Art Deco opal, conch pearl and diamond brooch the impressive diamond set geometric frame centrally set with a fine oval opal displaying intense play of colour surmounted by two conch pearl drops and fine black enamel and onyx detail, all in platinum. Il

An opal and diamond brooch the oval shaped opal within an openwork frame set with single, old European and baguette cut diamonds all in 18ct white gold

An opal and diamond brooch and a pair of opal earrings, the brooch centrally set with a solid crystal opal weighing 13.5cts flanked by five pear shaped opals and three round brilliant cut diamonds to either side, together with a pair of articulated drop ea

An Australian opal and seed pearl brooch/pendant of floral design, each petal set with a heart shaped crystal opal within a border of seed pearls, all in 15ct gold, hallmarked Duggin Shappere & Co.

Seven silver jewellery items; two marcasite brooches, a foliate brooch, a marcasite bracelet, a panel link bracelet set with opal fragments and a pair of cultured pearl earrings.

18ct yellow gold and white gold diamond/opal set Buddha figure brooch. Carved opal face and diamond set robe with one ruby earring. (total 11.4g)

Solid opal, diamond, ruby, sapphire, pearl and 18 ct white gold brooch-30

A sterling silver Australian Art and Crafts brooch set with opal

Opal brooch, the oval black opal measuring 22.00 x 13.0 cm is collet set in a frame highlighted with seed pearls, mounted in 18ct yellow gold. Accompanied by a fitted box by Hardy Bros

Gold mounted opal brooch and matching earrings

An antique bee set bar brooch, the bee in flight decorated with opal ruby old European and rose cut diamonds with a single cabochon cut opal to one end all in 9ct gold

Victorian opal and gold bar brooch set with seed pearls and a pair of opal and gold earrings

Opal, diamond and gold bar brooch. Central opal surrounded by 12 diamonds

Sterling silver and opal brooch. In the form of a nubian female face adorned with numerous chunks of solid opal. Stamped Stg Sil

An opal and diamond brooch/pendant, the oval cabochon cut solid white opal displaying red orange geen and blue play of colour weighing 10.0cts set in 18ct white gold and surrounded by fourteen graduating brilliant cut diamonds totalling 2.15cts