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 Stud Earrings – Deep Blue, Green & Red Pinfire (925 Silver)
Boulder Opal Stud Earrings – Deep Blue, Green & Red Pinfire (925 Silver)
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Riverglint - A pair of opals that look like green specs drifting through deep blue water, their pinfire pattern shimmering like tiny islands glowing beneath a moving tide.
These large boulder opal doublet stud earrings feature vivid flashes of deep blue, green and red across their polished freeform stones.
With brightness 4, the colour play is bold and lively, shifting beautifully as the earrings catch the light.
Each 8 × 6 mm opal is set in classic 925 silver, giving them a clean, timeless look that’s perfect for everyday wear or gifting.
A miner‑direct pair with striking multi‑colour pinfire and a smooth polished finish - ideal for anyone who loves opals with strong, vibrant personality.
- Opal Type: Boulder Opal
- Format: Doublet
- Colour: Deep Blue, Green, Red
- Pattern: Pinfire
- Shape: Freeform
- Finish: Polished
- Brightness: B4 (of 5)
- Stone Size: 8 × 6 mm
- Fitting: 925 Silver
- 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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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