Opal Brightness Explained
Opal brightness is graded on the B1–B5 scale, where B1 is very dim and B5 is vivid and intense.
Georgie's Gem Studio
Large White Opal Nugget – Rolling Flash on Five Sides
Large White Opal Nugget – Rolling Flash on Five Sides
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The Prismtrail Nugget - A vivid white opal nugget with streaks of colour dancing across every side, its rolling flashes of blue, green, red, yellow and orange tracing bright pathways over a sculptural freeform shape like a tiny prism lit from within.
This large polished white opal nugget is full of life, showing rolling flashes of blue, green, red, and yellow across five different sides.
With brightness 5, the colour play is vivid and energetic, shifting dramatically as the stone moves. Its freeform shape and natural contours give it a sculptural, organic feel, while the polished finish enhances the opal’s clarity and fire.
This is a solid opal still in its natural nugget form - perfect for collectors, wire‑wrappers, or anyone who loves opal in its most expressive state.
Sourced directly from the miner, it’s a rare, high‑impact piece with a beautiful mix of warm and cool tones.
- Opal Type: White Opal
- Format: Solid Nugget
- Colour: White with blue, green, red, orange & yellow flash
- Pattern: Rolling Flash
- Shape: Freeform
- Finish: Polished
- Brightness: B5 (of 5)
- Stone Dimensions: 28 × 11 × 11 mm
- Weight: 4 g
- Fitting: None (loose stone)
- Source: Miner‑direct
- Origin: White Opal Fields Australia
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About Our Opals
We only work with Australian opals, direct from #MinerToMaker.
Every stone is natural, untreated, and individually cut.
No two opals are ever the same - each piece is one‑of‑a‑kind.
We source directly from small Australian miners and cutters.
Every opal comes from Queensland’s ethical, regulated opal fields.
All photos are taken with a macro lens, remember to check the opal dimensions before purchasing.
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Ethical Opal Sourcing
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Caring for Australian Opal
A simple guide -
Opal Brightness Guide
Judging brightness