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
Polished Boulder Opal - Blue Purple Green Rolling Flash (Double‑Sided)
Polished Boulder Opal - Blue Purple Green Rolling Flash (Double‑Sided)
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Strikefall - Like a lightning strike tearing across a dark background, the rolling blue seams flashing like electric veins while the highlights spark around them like scattered bursts of colour. That little lilac hollow feels like the point of impact - the place where the bolt hit and left a glowing crater behind.
A small natural hollow reveals a vivid pocket of lilac colour, adding character and uniqueness to the stone.
Ethically sourced from a miner in Queensland, this piece showcases the raw beauty and complexity of Australian boulder opal.
With a brightness level of 4 and a polished freeform shape, this opal displays strong colour play from multiple angles. At 38 × 24 × 3 mm and weighing 7 g, it’s ideal for collectors, display pieces, or future jewellery projects.
A one‑of‑a‑kind Australian opal with striking natural features and exceptional colour movement.
- Opal Type: Boulder Opal
- Origin: Queensland, Australia (miner sourced)
- Style: Polished specimen stone
- Colour: Blue, Purple, Orange & Green
- Pattern: Broad Flash with rolling blue seams
- Shape: Freeform
- Finish: Polished
- Brightness: 4 (of 5)
- Dimensions: 38 × 24 × 3 mm
- Weight: 7 g
- Fitting: None (loose stone)
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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