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
Boulder Opal Cabochon – Teardrop Blue Green Flash
Boulder Opal Cabochon – Teardrop Blue Green Flash
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Earthwater - A boulder opal that looks like clear blue water rising from the dark earth, the vivid blue‑green broad flash lifting upward like a glowing spring pushing through ironstone. The teardrop shape makes it feel even more like a rising pool of light - calm, bright and beautifully grounded in its natural matrix.
This polished Australian Boulder Opal cabochon glows with a vivid blue‑green broad flash that catches the light beautifully.
Cut into a smooth teardrop shape, it’s a versatile stone ready for jewellers, wire‑wrappers, or collectors who appreciate natural opal character and miner‑direct sourcing.
Ethically mined and polished in Queensland, this opal’s brightness level 3 gives it a lively shimmer without overpowering its earthy ironstone base - a perfect balance of colour and authenticity.
- Opal Type: Natural Boulder Opal
- Dimensions: 25 x 18 x 2 mm
- Weight: 1 g
- Colour Play: Blue & green
- Pattern: Broad Flash
- Brightness: B3 (of 5)
- Shape: Teardrop
- Finish: Polished
- 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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Ethical Opal Sourcing
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A simple guide -
Opal Brightness Guide
Judging brightness