Opal and Diamond Buckle Brooch with Crystal Opal Center
18ct gold, diamond and opal brooch, of buckle motif, centred by an oval-shaped cabochon crystal opal weighing approximately 8.18 carats to a bead-set brilliant-cut diamond surround, the diamonds together weighing approximately 0.36 carats, length 19 mm,…
Opal Triplet Brooch with Diamonds in 14ct White Gold
14ct white gold, opal triplet brooch, set with two round brilliant cut diamonds of esimated .04cts. Brooch measures 45 mm x 22 mm, and finished weight 4.03 grams. Gemmologist report
Vintage 18ct White Gold Opal and Diamond Leaf Brooch
A vintage designer 18ct white gold diamond and opal brooch, the large oval opal with good green blue play of fire, In tapered crown like frame with scrolling leaf design all bead set with multiple diamonds.
Opal and Diamond Geometric Brooch with Platinum Setting
Platinum, opal and diamond brooch. Centring a claw-set oval opal cut en cabochon weighing approximately 14.00 carats, within a geometric surround detailed with single, rose and old European-cut diamonds together weighing approximately 0.70 carats, length…
Opal and Diamond Cluster Brooch in 18ct Yellow Gold
Classic opal and diamond cluster brooch, hand crafted from 18ct yellow gold and set with 1= approximate 2.56ct light crystal opal showing colours from pink, green, yellows and blues. Surrounding the opal are 20= 0.40ct H colour SI clarity brilliant cut…
Opal and Diamond Wing Pendant/Brooch
Opal and diamond pendant/brooch, the boulder opal carved as a wing and accented with round brilliant-cut diamonds, estimated total diamond weight 0.60 carats, 18ct gold, weight 17.5gm, length 5.5 cm. Recipient of international, design Award, Bangkok 1993.…
Opal and Diamond Female Figure Brooch with Design Award
Opal and diamond brooch, the black opal carved in the form of a female figure and framed by round brilliant-cut diamonds, estimated total diamond weight 2.30 carats, 18ct gold, weight 13.9gm, length 8 cm. Recipient of international, design Award, Bangkok…
Australian Art Deco Opal and Diamond Brooch
An Australian Art Deco 18ct white gold brooch, set with a stunning solid white opal, flanked by two brilliant cut white diamonds, early to mid 20th century, maker's marks rubbed, 5.9 cm wide, 4.6 grams total
1930 Art Deco Opal and Diamond Brooch with Box
Platinum opal and diamond brooch, circa 1930; of Art Deco design centring a claw-set oval-shaped cabochon opal weighing approximately 18.62 carats, within an openwork geometric frame accented with millegrain-set old mine-cut diamonds together weighing…
Antique Opal and Diamond Bar Brooch with Box
Morison & Daley of Wagga Wagga, antique 9ct yellow gold bar brooch, set with an opal doublet surrounded by white diamonds, in original retailer's plush fitted box, 19th/20th century, 5.5 cm wide, 3.3 grams
Opal, Ruby and Diamond Bar Brooch in 15ct Gold
Opal, ruby and diamond bar brooch, set with circular-cut rubies and old-cut diamonds, mounted in 15ct gold, length 5.2 cm.
Opal and Emerald Tree of Life Brooch
14ct gold, opal, emerald and diamond brooch, stamped 14k, in tree of life design, comprising twenty pear shaped cabochon white opals, five round cut diamonds and four round cut emeralds in four pronged settings, total weight 14gm, height 4.6 x width 4.3 cm
Opal and Diamond Gold Brooch
A yellow and white gold brooch, featuring one 6.8 x 18 mm, oval cabochon cut opal, of reported weight 6.82 carats, in a 4x claw setting, accented with 4x round brilliant cut diamonds of reported total weight .05 carats, H coloiur, SI1 clarity, of finished…
Victorian Bug Bar Brooch with Diamonds, Opal and Sapphire
Victorian 14ct diamond opal and sapphire Bug bar brooch, body set with sapphire and opal with rose cut diamonds to the wings and highlighted with end diamonds
Opal and Diamond Brooch from New Zealand Colony
New Zealand Colonial 15ct milk opal and six stone diamond brooch, central cabochon white opal approx 6.15cts with fiery orange flecks, open circle frame supported with six old single cut diamonds, stamped 15ct with possible original labeled G Coates Co…
Opulent Bee Brooch with Opals, Sapphires, Diamonds, and Rubies
A quality early 20th century 18ct yellow and multiple gem set bee brooch, elegantly modelled with colourful cabochon opal set abdomen, facetted oval 'intense blue' 0.81ct sapphire set thorax, each wing with two rows of brilliant cut diamonds, ruby eyes.…
Opal and Diamond Crescent Brooch
An impressive antique Australian 15ct yellow gold crescent brooch set with nine graduated solid domed cabochon opals interspersed with 20 diamonds (approximately 0.5ct), 19th/20th century, 3 cm wide, 7.25 grams total. Accompanied by a Kosta gold &…
Gold and Opal Horseshoe Brooch with Diamonds
A c1900 gold and opal horseshoe brooch, set with 11 graduating oval cabochon opals, one with small chip, spaced by 20 small old mine cut diamonds. Height 2.8 cm.
Opal and Diamond Ribbon Brooch
18ct yellow and white gold handmade brooch, featuring an oval cabochon cut crystal opal of estimated 3.20 carats, in a spray ribbon design accented with five round brilliant cut diamonds of estimated total weight .19 carats. Total weight 4.44 grams.…
Opulent Opal Brooch in 14ct Yellow Gold
14ct yellow gold and white opal brooch, marked 585, with makers mark 'Kp', of elongated diamond form in a textured and splintered finish, set with central cabochon cut solid white opal, total weight 6.38gm, length 6 cm
Rose Gold Opal and Diamond Floral Brooch
A vintage 9ct rose gold opal and diamond brooch, the floral spray claw set with six oval cabochon opals, the stems collar with three bead set diamonds. Provenance: Ex. Webb's auction 'Worn at the Ritz' 2019. 7.95gm.
18ct Gold Opal and Diamond Brooch with Organic Texture
An 18ct gold opal and diamond brooch; textured organic strips set with an oval solid black opal of approx. 2.00ct, with mainly violet green colour surrounded by 3 old Europen cut diamonds totalling approx. 0.40ct, size 49 x 28 mm, wt. 13.2g.
Opal and Diamond French Brooch
Opal and diamond brooch, the outstretched wings centred by an oval opal and suspending an opal drop, French assay mark, mounted in gold, weight 7.5gm, width 6.5 cm.
Black Opal and Diamond White Gold Brooch
Black opal and 18ct white gold brooch also set with 6x round brilliant cut diamonds, marked 750, opal size 21 x 13 x 3.2 mm, item weight 11.3 grams
Opal and Diamond Cluster Brooch in 9ct Gold and Silver
9ct gold, silver, opal and diamond brooch, of openwork cluster design, comprising nine circular opals cut en cabochon together weighing approximately 0.80 carats and old European and rose-cut diamonds together weighing approximately 1.92 carats, diameter…
Opal and Diamond Brooch in White Gold
14ct white gold, opal and diamond brooch, the oval opal cut en cabochon weighing approximately 68.00 carats, within a surround of twenty-four old European-cut diamonds together weighing approximately 2.80 carats, length approximately 28 mm, width…
Modern Opal and Diamond Brooch in 18ct Yellow Gold
An 18ct yellow gold, modern opal and diamond brooch, featuring one channel / tab set triangular opal tablet of reported weight 22.0 carats, surrounded by nine grain set round brilliant cut diamonds of reported total weight .20 carats, in a hexagonal,…
Frog Opal Brooch with Diamond Eyes
Solid white opal brooch styled in a frog design and set with two old European cut diamonds as eyes approximate weight 0.25ct and oval opal with good play orange yellows. Total weight of the 18ct gold brooch is 8.4 grams.
Opal and Ruby Duck Brooch with Diamonds
A gold, opal and ruby duck brooch the textured gold duck set with a white opal cabochon belly and ruby eye, sitting atop a pool of water in white gold, accented with single-cut diamonds, estimated total diamond weight 0.20 carats, mounted in 18ct white…
Black Opal & Diamond Gold Brooch, Mid-Century Australian
Mid century Australian black opal & diamond set with gold brooch, unmarked, opal dimensions 21 x 19 x 5 mm, item weight 10.60ct. Set with old mine cut diamonds, the gemstones were taken from an older piece and reset. tests as 12ct
Opal and Diamond Brooch/Pendant in Yellow & White Gold
18ct yellow & white gold opal & diamond brooch/pendant, oval white opal multi claw, set with 3 diamonds above, below and to each side in white gold four claw collets, diamond weight around 1.08ct, opal approx. 12ct. Total weight approx. 10.5g (approx.).…
Opal and Diamond Antique Rose Gold Brooch
Antique rose gold and milky cabochon opal and diamond bar brooch and safety chain, hallmarked Birmingham 1896, 15.625ct
Opal and Diamond Brooch/Pendant in White Gold
18ct white gold, opal and diamond brooch/pendant, centring a freeform boulder opal, overlaid with round brilliant-cut diamond decoration, within a large basket surround bordered by further brilliant-cut diamonds together weighing approximately 1.30 carats…
Opal and Diamond 9ct Gold Bar Brooch
A bar brooch, set with a white opal, single diamond, on 9ct gold. Weight 3.4grams.
Opal Stickpin, Earring & Diamond Brooch Set, Antique 19th Century
An antique rose gold and solid opal stickpin, hoop earring and diamond set bar brooch (incomplete), 19th century, (3 items), 4.7 grams total
Antique Gold Opal Diamond Bar Brooch
An antique gold bar brooch set with sold opal surrounded by old cut diamonds, 19th century, stamped '9ct', 5.75 cm wide, 5.7 grams
Victorian Opal and Diamond Brooch in Hardy Bros. Box
Victorian opal and diamond set yellow gold brooch in a Hardy Bros. Sydney box. Length 75 mm, weight 11 grams, 19x oval opal cabochons 2 x 2.3 mm - 8.5 x 5.4 mm. Tests as 18ct gold. Estimated opal weight 6.90ct of South Australian crystal opal type.…
Opal, Diamond and Ruby Insect Brooch by Hardy Bros
An antique opal, diamond and ruby brooch, the finely detailed insect, having a cabochon opal set body, ruby set eyes and rose cut diamond set wings, in 9ct gold, retailed by Hardy Bros Ltd, boxed.
Opal and Diamond Brooch with Rubies and Pearls
15ct yellow gold brooch set with opal, diamond seed pearls and rubies
Opal and Diamond Bee Brooch by Tony White
Tony White, a cultured pearl, opal and diamond brooch, designed as a bee, set with opal, round brilliant-cut diamonds and an oval and drop-shaped cultured pearl, the latter measuring approximately 11.90 x 9.88 mm, signed white, estimated total diamond…
Grima Opal and Diamond Starburst Brooch
Grima, an opal and diamond brooch, of star burst design, centrally set with a free form black boulder opal measuring approximately 14.48 x 9.83 mm within a halo of round brilliant-cut diamonds, signed Grima, mounted in gold, length 3.00 cm.
Opal and Diamond Ribbon Brooch
An 18ct opal and diamond set ribbon brooch, the oval cabochon cut semi translucent very bright-bright opal with green to orange dominant hues, the white gold bars highlighted by five round brilliant cut diamonds of TDW. 0.19ct. Length 11.5 cm.
Opal and Diamond Brooch with Rose Cut Accents
An opal and diamond brooch, the oval opal weighing an estimated 14.05cts with fine play of colour, detailed with four rose cut diamonds, in 15ct gold, circa 1930.
Art Deco Opal and Diamond Brooch
An opal and diamond brooch, of Art Deco style, the pierced bar, centred with a solid oval opal within a surround of fine diamond detail in millegrain decoration, in platinum.
Opal and Diamond Brooch with Foliate Motif
Opal and diamond brooch the oval cabochon opal weighing approximately 6.50 carats is claw-set in 18ct matte gold and partially framed by a stylised foliate motif embellished with brilliant-cut diamonds, the diamonds together weighing approximately 0.15…
Jelly Opal Gold Bar Brooch with Diamonds and Coins
Gold bar brooch set with a cabochon jelly opal surrounded by 4 diamonds and flanked by two American gold coins, 6 cm long, 6.6 grams total
Agatha Christie's Giardinetto Brooch with Precious Stones
A diamond and gem set Giardinetto brooch formerly belonging to Agatha Christie, the sizable basket and bouquet comprising opals, rubies, sapphires, emeralds, rose and single cut diamonds, all in two tone 18ct gold, circa 1950. Provenance: Sale of the…
Opal and Diamond Bar Brooch in 18ct Gold and Platinum
An opal and diamond bar brooch, the solid oval opal weighing an estimated 3.75cts, flanked by single cut diamonds, all centred on a bar, in 18ct gold and platinum.
Opal, Diamond & Pearl Brooch in 9ct Gold & Silver
An opal, diamond and seed pearl brooch, featuring an oval opal within a surround of eight old European cut diamonds and pearl set terminals, in 9ct gold and silver.
Opal and Diamond Heart Pendant/Brooch
An impressive Edwardian 9ct gold opal and diamond pendant/brooch, the 41.30ct white opal in the form of a heart with a bright red-blue multi-colour play of fire, held by three diamond set claws, the opal heart pierced by a diamond set arrow, with a…
Opal & Diamond Butterfly Brooch in 9ct Gold
An opal and diamond butterfly brooch, Comprisng wings set with boulder opal and antennae set with round brilliant cut diamonds, in 9ct gold.
14ct Gold Opal & Diamond Bar Brooch
An 14ct yellow gold solid white opal & diamond bar brooch, one solid opal, 3 mm with rose cut diamonds, 0.15ct mounted in a bar brooch, Wt 8.5 grams
18ct Gold Opal & Diamond Bar Brooch with Rose Cut
An 18ct yellow gold solid white opal & diamond bar brooch, one solid opal, 3 mm with rose cut diamonds, 0.15ct mounted in a bar brooch Wt 8.5 grams
Opal and Diamond Brooch Pendant in 18ct White Gold
An opal and diamond brooch / pendant, featuring an oval opal cut en cabochon weighing 49.60cts, surrounded by round brilliant cut diamonds totalling 2.08cts, in 18ct white gold.
Opal and Diamond Bar Brooch with Certificate
An opal and diamond bar brooch, the central oval white opal weighing 2.20cts surrounded by twenty old cut diamonds, estimated weight 0.80cts and two old cut diamonds, estimated weight 0.30cts, in 18ct yellow and white gold, with accompanying John T.…
Victorian Opal and Diamond Insect Brooch
A Victorian insect brooch, claw set oval 7.0 x 5.0 mm cabochon opal throax accented with one claw set early round cut diamond of estimated weight 0.08 carats, fourteen grain set demantoid garnets of estimated total weight 0.11 carats and sixteen grain set…
Opal and Diamond Art Deco Brooch
An Art Deco opal and diamond brooch, the geometric plaque featuring a central oval opal doublet with fine play of colour, within a pierced surround set with single cut diamonds, in platinum.
Opal and Diamond Floral Brooch in 14ct White Gold
An opal and diamond brooch, of stylised floral form, centred with a round opal cut en cabochon, within an open surround set with round brilliant and single cut diamonds, in 14ct white gold.
Opal and Diamond Brooch in 18ct Gold
An opal and diamond brooch, the oval opal cut en cabochon, within a surround of old European cut diamonds, in 18ct gold.
Opal & Diamond Handmade Antique Brooch in Original Box
Antique gold, diamond and opal brooch handmade hanging brooch with a gold ribbon form top set with 9@ old cut diamonds. The backed flat drop opal measures appro@ 40.9 mm length, 23.9 mm wide. Unmarked. In its original box
Flower Opal Diamond Gold Brooch
Opal, diamond and gold brooch. An carved opal in the form of a flower set with, appro@ 5@ round cut diamonds, appro@ 5.90 grams weight
Opal and Diamond Enhancer/Brooch in 18ct Yellow Gold
Doublet opal & diamond Enhancer/Brooch, a 19 x 23 mm freeform doublet embellished with twenty-six round brilliant cut diamonds totalling 0.13cts, H-I, Si, set in 18ct yellow gold fancy scroll design, measuring an overall 53 x 28 mm, with box, 13.4 grams
Opal, Sapphire, and Diamond Brooch in 9ct Gold
9ct gold, opal, sapphire and diamond hand made brooch in 9ct (tests as) set with a single solitaire black opal approx 23.3 mm x 23.5 mm x 7.3 mm cut cabochon. Colours include: green, yellow, orange and some red. sapphire approx 3.2 mm-3.4 mm round…
Vivid Black Opal and Diamond Floral Brooch
An exceptional black opal and diamond brooch, designed as a freeform floral spray, having three solid black opals displaying a vivid play-of-colour all totalling 15.45cts, the main stone with harlequin pattern, accompanying stones with harlequin and…
Mexican Fire Opal Brooch with Diamonds and Pearls
An antique fire opal brooch, the circular brooch set with a Mexican fire opal cut en cabochon, surrounded by a border of twelve old European cut diamonds, to an outer row of pearls, mounted in rose gold.
Black Opal and Diamond Brooch in White and Rose Gold
Diamond and opal brooch, featuring a pear shaped black boulder opal surrounded by a cluster of diamonds grain set in 18ct white gold with milgrain detailing, upon a 15ct rose gold bar, with a safety chain, stamped 'W.15.D, 5.14 grams
Crystal Opal and Diamond Antique Brooch
A crystal opal and diamond antique brooch. 15ct yellow gold, hallmarked Australian, presented as a bar brooch style piece, centred by an oval cabochon crystal opal of strong spectral colours, measuring approximately 11 x 9 mm, framed by smaller old cut…
Opal and Diamond Bar Brooch in 14ct Gold
14ct gold, opal triplet and diamond bar brooch, weight: 4.33 grams
9ct Gold Opal & Diamond Bar Brooch with 2 Diamonds
A 9ct yellow gold solid opal & diamond bar brooch, one round solid semi black opal 9 mm with two old mine cut diamonds, 0.10ct mounted in a yellow gold fancy bar brooch, Wt 3.4grams
Opal and Diamond Brooch in Gold and Platinum
A solid white opal and diamond set brooch, 18ct yellow gold and platinum, retailed through Catanachs, presented as a solid cabochon white opal of strong blocked spectral colours, lime, red, blue and violet throughout, weighing approximately 1`6.80ct,…
Black Opal and Diamond Antique Brooch Pendant
A stunning solid black opal and diamond brooch / pendant, 18ct and 14ct white gold, antique styled, the feature oval cluster set with a central solid black opal from Lightening Ridge, weighing approximately 2.88ct, intense colours throughout of red, blue,…
Opal and Diamond Bar Brooch in 18ct White Gold
An antique opal and diamond bar brooch, the oval solid black opal cut en cabochon displaying red, green and blue colours, surrounded by fourteen single cut diamonds, set above a knife edge bar, mounted in 18ct white gold.
Opal and Diamond Pendant/Brooch with 14ct Gold Frame
An opal and diamond pendant/brooch, the pierced scroll frame set throughout with round brilliant cut diamonds, centrally suspended with a pear shaped solid white opal cut en cabochon displaying good play of colour, suspended to a trace chain, all mounted…
Opal and Diamond Brooch Pendant in 18ct White Gold
Exquisite opal and diamond set brooch / pendant with five large solid opals and two diamonds in 18ct white gold
Peacock Pearl Brooch with Coloured Diamonds and Gemstones
18ct gold, coloured diamond, diamond and gem-set brooch, modelled as a peacock resting on a 14.85 mm South Sea cultured pearl, the eyes accented with a circular-cut ruby, the neck and saddle pave set with brilliant-cut diamonds of yellow hue, the breast…
Opal and Diamond Brooch/Pendant in 15ct Gold
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.
Opal and Diamond Retro Brooch/Pendant
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,…
Opal and Diamond Brooch in 14ct White Gold
14ct white gold, opal and diamond brooch, centring a claw-set cushion-shaped opal measuring approximately 18.00 x 14.00 x 8.00 mm framed by a line of brilliant-cut diamonds flanked by a foliate motif embellished with diamonds, the diamonds together…
Opal and Diamond Cocktail Brooch in 14ct Gold
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
Opal and Diamond Bar Brooch by Denton Jewellers, Wellington
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 3.2 mm Provenance: Being of direct family…
Opal and Diamond Bar Brooch with Central Cluster
18ct opal and diamond bar brooch central cluster of oval milk opal and 20 diamonds
Peacock-inspired Opal Brooch with Diamond and Gold Accents
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…
Opal and Diamond Bar Brooch in 18ct Gold
An 18ct gold opal and diamond bar brooch, centring a 10 x 7.5 mm fine crystal opal adjacent to crescent mounts set with single cut diamonds, length 58 mm, wt. 4.7g.
Opal, Pearl, and Diamond Ribbon Brooch
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 52 mm
Opal and Diamond Cartouche Brooch/Pendant
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
Opal, Diamond, and Ruby Swan Brooch by Prouds Jewellers
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.…
Opal and Diamond Bar Brooch in 18ct Gold
18ct gold, solid opal and diamond bar brooch, weight: approx 3.9 grams
Forster's Opal and Diamond Starfish Pendant/Brooch
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…
Opal and Diamond Brooch in Platinum Foliate Frame
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.
Opal, Ruby and Diamond Crescent Brooch in 9ct Gold
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
Opal and Diamond Bar Brooch in 18ct Gold
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.
Opal and Diamond Sunburst Brooch/Pendant by Forster, Melbourne
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,…
Opal, Ruby and Diamond Insect Brooch
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
Victorian Opal and Diamond Brooch
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…
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