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17.3ct Lightning Ridge Dark Opal Nobby Split Pair
Regular price
$800.00
AUD
Weight 4.55 CT
Dimensions 23.88x12.3x6.35 | 19.05x12.13x5.87mm
Body Tone Dark N5
Brightness B3 Bright
Cut Uncut | Split Nobby
Dome Low
Predominant Colours Orange, Gold, Red, Blue, Purple, Green, Yellow
Opal Origin Lightning Ridge, Nobby Opal
SKU OHA-26-PA-0020
A 17.3ct pair of natural Lightning Ridge Dark Opal Nobby Rough from a Quality Field, formed as a Nobby that has naturally broken or split into two pieces.
The larger side weighs 10.2ct and measures 23.88 × 12.50 × 6.35 mm. The smaller side weighs 7.0ct and measures 19.05 × 12.13 × 5.87 mm.
Body Tone indicators sit around N5 Dark, with B3 Brightness indicators visible through the exposed split faces.
From the inside surfaces, the colour bar shows the distinctive vertical structure we call the Opal Smile here at Opal Hub Australia, with bright Green and Blue dominating and touches of Yellow to Gold also showing through.
The exposed split gives a particularly good look into the internal colour structure, while the remaining natural Nobby matrix cap preserves plenty of potential still to be explored.
A bright, characterful pair from a Quality Field with strong visible colour and genuine cutting potential across both pieces. If cut, there is a strong likelihood of producing a naturally related matching pair from the same original Nobby.
It would suit a cutter looking for an interesting project, while also making a fantastic collector specimen in its current form.
Authentic. Rare. Unforgettable.
Body tone scale
The Body Tone Scale measures the lightness or darkness of an opal’s background, ranging from white to black. To use it, place your opal face-up on the chart and slide it along until its tone matches one of the reference samples, helping you accurately determine its body tone grade.
The Body Tone Scale measures the lightness or darkness of an opal’s background, ranging from white to black. To use it, place your opal face-up on the chart and slide it along until its tone matches one of the reference samples, helping you accurately determine its body tone grade.
Brightness scale
The Brightness Scale measures the intensity and vibrancy of an opal’s play of colour, indicating how strongly the colours appear under light. To use the scale, place your opal face-up on the chart and move it along until its brightness most closely matches one of the reference levels. This helps you accurately assess the opal’s overall brilliance and visual impact.
The Brightness Scale measures the intensity and vibrancy of an opal’s play of colour, indicating how strongly the colours appear under light. To use the scale, place your opal face-up on the chart and move it along until its brightness most closely matches one of the reference levels. This helps you accurately assess the opal’s overall brilliance and visual impact.
B5
Vivid
B4
Very Bright
B3
Bright
B2
Moderately Bright
B1
Subdued
Please note:
This Body Tone and Brightness Scale is intended as a general reference only. Any decisions made using this guide are at the user's discretion and no liability is assumed. For most accurate results, laser print this guide on Artboard 350gsm paper stock or similar.
Australian opal is one of nature's most extraordinary gemstones. With simple care it will hold its beauty for a lifetime.
Keep away from prolonged heat, direct sunlight, and environments that draw moisture from the stone. Clean with a soft damp cloth. Avoid sharp blows and hard knocks.
For any other questions contact us.
All orders dispatched within 3 to 5 business days. Free shipping on online store orders over $199 AUD for Australia and New Zealand. Worldwide shipping available to every destination. Please ensure your delivery address and contact details are correct at checkout. Orders are dispatched to the address provided.
All shipments are declared at full value.
Online store purchases come with a 14 day satisfaction guarantee. If you are not happy contact us immediately. Once material has been altered, modified, or damaged in any way it is no longer eligible for return.
For full details visit our FAQ or contact us.
Hand selected Lightning Ridge opal, live. Rough, rubs, finished stones, fossils and specimens presented honestly and in real time. Something for the hobbyist, the collector, and the jeweller.
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Discover by Category
High Grade
Finished Opals
Cut, polished, and ready to set, wear, or collect. Every stone hand selected for its outstanding colour, pattern, and brightness. A unique expression from nature.
Under $500 AUD
Rough, Rubs and More
Lightning Ridge opal for every level. Hand selected rough, rubs, and smaller pieces starting under $500 AUD, with options across every price point. Genuine colour and character in every piece.
The Opal Hub Story
The first time I saw a true gem black opal, it was like looking into another world. I can still see it in my mind's eye. That moment is why Opal Hub Australia exists.
High Grade
Finished Opals
Cut, polished, and ready to set, wear, or collect. Every stone hand selected for its outstanding colour, pattern, and brightness. A unique expression from nature.
Under $500 AUD
Rough, Rubs and More
Lightning Ridge opal for every level. Hand selected rough, rubs, and smaller pieces starting under $500 AUD, with options across every price point. Genuine colour and character in every piece.
The Opal Hub Story
The first time I saw a true gem black opal, it was like looking into another world. I can still see it in my mind's eye. That moment is why Opal Hub Australia exists.
They Don't Have To Be Big In The Ridge!
After years sourcing black opal from Lightning Ridge I know this. The size of an opal is only part of the measure. The colour, the pattern, the brightness. That's where the stone becomes art and tells its true story.
Frequently Asked Questions
Opalised fossils are ancient plant and animal remains that have been
naturally preserved or replaced by opal over millions of years.
Many fossils discovered in the Lightning Ridge region date back roughly 100 million years to the Early Cretaceous Period.
The Lightning Ridge opal fields have produced a wide variety of rare and
highly sought after fossil material including Dinosaur Bone Fragments,
Plesiosaur Teeth and Vertebrae, Shark Teeth, Opalised Wood, Fossilised
Plant Material, and Freshwater Shell Fossils.
