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 Necklace – Drilled Tribal (Double‑Sided)
Boulder Opal Necklace – Drilled Tribal (Double‑Sided)
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Riverisles - Little round islands surrounded by winding blue‑green rivers, its tribal broad‑flash pattern flowing across the stone like a tiny glowing landscape.
This unique boulder opal tribal necklace features a natural double‑sided stone with blue‑green tones and a tribal broad flash.
Ethically sourced directly from a family‑run opal mining operation in South Australia, this piece carries both beauty and genuine provenance.
The stone has been polished to a smooth finish and fitted to a leather cord, creating an earthy, wearable style that suits everyday jewellery lovers and opal collectors alike.
Its freeform shape and natural brightness level of 3 give it a striking presence.
Whether worn as a statement piece or gifted to someone special, this one‑of‑a‑kind Australian opal necklace is ready for its new owner.
- Opal Type: Boulder Opal
- Origin: South Australia
- Style: Drilled, double‑sided pendant
- Colour: Blue/Green
- Pattern: Tribal Broad Flash
- Shape: Freeform
- Finish: Polished with natural imperfections
- Brightness: 3 (of 5)
- Dimensions: 30h × 18w × 3d mm
- Weight: 10g
- Fitting: Adjustable leather cord
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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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Ethical Opal Sourcing
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A simple guide -
Opal Brightness Guide
Judging brightness