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
Large Solid Boulder Opal – Green Pinfire
Large Solid Boulder Opal – Green Pinfire
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The Duskstone Cluster - A large boulder opal dotted with tiny circular patterns on a dark matrix, its soft green pinfire glimmering like faint stars gathering at the edge of twilight.
This large polished boulder opal shows gentle green pinfire across its freeform surface, with a warm ironstone matrix that adds depth and natural character.
With brightness 1, the colour play is soft and understated - perfect for those who love earthy, organic opal pieces.
Its generous size and smooth polish make it ideal for wire‑wrapping, statement pendants, or as a tactile collector’s stone.
A miner‑direct piece with a calm, grounded aesthetic.
- Opal Type: Boulder Opal
- Format: Solid
- Colour: Green
- Pattern: Pinfire
- Shape: Freeform
- Finish: Polished
- Brightness: B1 (of 5)
- Stone Dimensions: 39 × 26 × 5 mm
- Weight: 11 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