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 – Green, Blue & Purple Flash (Double‑Sided Freeform)
Solid Boulder Opal – Green, Blue & Purple Flash (Double‑Sided Freeform)
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The Canyonflare Crest - A freeform boulder opal shaped like a tiny canyon cut through stone, its bright green‑blue‑purple flash flowing along the edges while fine pinfire glimmers like light catching on distant ridges.
This polished, double‑sided boulder opal shows a beautiful mix of green, blue and purple flash, with a bright streak of colour running along the bottom edge.
The freeform shape and natural ironstone matrix give it an earthy, organic feel, while the polished finish brings out the opal’s soft glow.
With brightness 3, the colour play is lively without being overpowering - perfect for artisan jewellery makers or collectors who love stones with subtle movement and character.
A miner‑direct piece full of natural charm.
- Opal Type: Boulder Opal
- Format: Solid
- Colour: Green, Blue, Purple
- Pattern: Broad Flash with pinfire accents
- Shape: Freeform
- Finish: Polished
- Brightness: B3 (of 5)
- Stone Dimensions: 22 × 16 × 4 mm
- Weight: 4 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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More from the Studio
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Stories from the Studio
Read our latest posts -
Ethical Opal Sourcing
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Caring for Australian Opal
A simple guide -
Opal Brightness Guide
Judging brightness