28.00 Carat Natural Untreated Black Opal | 18k Yellow Gold | GCS Certified
Few gemstones possess the quiet authority of a fine black opal. Rarer than diamonds and revered by collectors for centuries, the finest examples seem to hold light captive beneath their surface. This extraordinary brooch centres upon an exceptional natural black opal displaying an arresting display of vivid electric-blue play-of-colour that shifts and dances with every movement.
Certified by Gemmological Certification Services (GCS) as a natural precious black opal with no indications of treatment, the opal weighs approximately 28.00 carats and measures an impressive 27.8 × 23.0 mm. Rather than relying on a kaleidoscope of colours, this remarkable gemstone captivates through broad flashes of saturated cobalt and royal blue, suspended against a deep black body tone. The effect is almost celestial—reminiscent of distant galaxies illuminated against a midnight sky.
The opal is presented within a beautifully restrained 18k yellow gold mount, hallmarked 750, whose clean architectural lines frame the gemstone without distraction. Four polished gold mounts secure the cabochon, while tapering geometric terminals are delicately set with brilliant-cut diamonds, lending just the right degree of refinement. The result is a sophisticated composition in which every element serves to enhance the extraordinary presence of the opal itself.
Ingeniously designed as both a brooch and pendant, the reverse incorporates a discreet folding pendant bale alongside the brooch fitting, allowing the piece to be worn in multiple ways without compromising its elegant profile.
Natural black opals of this calibre are among the world's most coveted coloured gemstones. Their rarity, combined with their incomparable optical phenomenon, ensures they remain highly sought after by discerning collectors and connoisseurs alike. Whether admired as a work of wearable art or acquired as an important addition to a serious gemstone collection, this is a jewel of exceptional character and enduring significance.
Gemstone: Natural Black Opal
Certification: Gemmological Certification Services (GCS)
Treatment: No indications of treatment
Estimated Opal Weight: Approx. 28.00ct
Opal Dimensions: 27.8 × 23.0 × 7.8 mm
Cut: Cabochon
Optical Phenomenon: Play of Colour
Diamonds: Six brilliant-cut diamonds
Metal: 18k Yellow Gold (Hallmarked 750)
Fittings: Convertible brooch and pendant
Condition: Excellent
Accompanied by: Original GCS Gemmological Report
A rare union of nature's artistry and refined goldsmithing, this exceptional black opal jewel stands among the most captivating examples of its kind—an heirloom-quality treasure destined to be admired for generations.
28.00 Carat Natural Untreated Black Opal | 18k Yellow Gold | GCS Certified
Few gemstones possess the quiet authority of a fine black opal. Rarer than diamonds and revered by collectors for centuries, the finest examples seem to hold light captive beneath their surface. This extraordinary brooch centres upon an exceptional natural black opal displaying an arresting display of vivid electric-blue play-of-colour that shifts and dances with every movement.
Certified by Gemmological Certification Services (GCS) as a natural precious black opal with no indications of treatment, the opal weighs approximately 28.00 carats and measures an impressive 27.8 × 23.0 mm. Rather than relying on a kaleidoscope of colours, this remarkable gemstone captivates through broad flashes of saturated cobalt and royal blue, suspended against a deep black body tone. The effect is almost celestial—reminiscent of distant galaxies illuminated against a midnight sky.
The opal is presented within a beautifully restrained 18k yellow gold mount, hallmarked 750, whose clean architectural lines frame the gemstone without distraction. Four polished gold mounts secure the cabochon, while tapering geometric terminals are delicately set with brilliant-cut diamonds, lending just the right degree of refinement. The result is a sophisticated composition in which every element serves to enhance the extraordinary presence of the opal itself.
Ingeniously designed as both a brooch and pendant, the reverse incorporates a discreet folding pendant bale alongside the brooch fitting, allowing the piece to be worn in multiple ways without compromising its elegant profile.
Natural black opals of this calibre are among the world's most coveted coloured gemstones. Their rarity, combined with their incomparable optical phenomenon, ensures they remain highly sought after by discerning collectors and connoisseurs alike. Whether admired as a work of wearable art or acquired as an important addition to a serious gemstone collection, this is a jewel of exceptional character and enduring significance.
Gemstone: Natural Black Opal
Certification: Gemmological Certification Services (GCS)
Treatment: No indications of treatment
Estimated Opal Weight: Approx. 28.00ct
Opal Dimensions: 27.8 × 23.0 × 7.8 mm
Cut: Cabochon
Optical Phenomenon: Play of Colour
Diamonds: Six brilliant-cut diamonds
Metal: 18k Yellow Gold (Hallmarked 750)
Fittings: Convertible brooch and pendant
Condition: Excellent
Accompanied by: Original GCS Gemmological Report
A rare union of nature's artistry and refined goldsmithing, this exceptional black opal jewel stands among the most captivating examples of its kind—an heirloom-quality treasure destined to be admired for generations.
