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 (Polished Freeform)
Large Solid Boulder Opal – Green Pinfire (Polished Freeform)
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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 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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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