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 Flash
Polished Boulder Opal – Blue, Purple & Green Flash
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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. The little lilac hollow 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
- Style: Polished specimen stone
- Colour: Blue, Purple, Orange & Green
- Pattern: Broad Flash with rolling blue seams
- Shape: Freeform
- Finish: Polished
- Brightness: B4 (of 5)
- Dimensions: 38 × 24 × 3 mm
- Weight: 7 g
- Fitting: None (loose stone)
- Source: Miner-direct
- Origin: Boulder Opal Fields, Queensland, Australia
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About Our Opals
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 a small Australian mining family, from ethical and regulated opal fields.All photos are taken with a macro lens, remember to check the opal dimensions before purchasing.
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Why Buy From Us
We only work with Australian opals. Every opal is sourced directly from a small‑scale Australian mining family who work with integrity, fairness, and respect for the land. Ethical sourcing and environmental responsibility matters to us.
We want you to be delighted with every purchase, so please read our policies or contact us if you want to find out more:
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Stories from the Studio
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Ethical Opal Sourcing
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Caring for Australian Opal
A simple guide -
Opal Brightness Guide
Judging brightness