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
Solid Boulder Opal – Purple & Blue Broad Flash (Double‑Sided)
Solid Boulder Opal – Purple & Blue Broad Flash (Double‑Sided)
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The Volcanicflare - A freeform boulder opal with a corner that rises like a tiny volcano, its purple‑blue flashes and scattered pinfire glowing around it like drifting lava sparks against warm ironstone.
This polished, double‑sided boulder opal glows with a mix of pinfire and broad flashes of purple and blue, shimmering across its freeform surface.
The natural ironstone matrix adds warmth and grounding, giving the piece that classic boulder opal texture and contrast.
With brightness 3, the colour play is lively yet balanced - flashes of violet and indigo appear as the stone moves, creating a subtle but captivating effect.
Its polished finish and organic shape make it ideal for a pendant, wire‑wrapped design, or collector’s display.
Sourced directly from miners, this is a one‑of‑a‑kind Australian opal full of natural charm.
- Opal Type: Boulder Opal
- Format: Solid
- Colour: Purple, Blue
- Pattern: Broad Flash with pinfire accents
- Shape: Freeform three sided
- Finish: Polished
- Brightness: B3 (of 5)
- Stone Dimensions: 27 × 21 × 4 mm
- Weight: 5 g
- Back: Double‑sided with ironstone matrix
- Fitting: None (loose stone)
- Source: Miner‑direct
- Origin: Boulder 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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A simple guide -
Opal Brightness Guide
Judging brightness