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
Solid Boulder Opal Necklace - Green Tribal Pattern Adjustable Cord
Solid Boulder Opal Necklace - Green Tribal Pattern Adjustable Cord
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Greenspire - A boulder opal that looks like vivid green lines rising through earthy matrix layers, its tribal pattern flowing upward like nature etched in glowing stone.
This solid boulder opal necklace features a vivid green tribal‑style pattern that flows across its polished surface, catching the light with subtle pinfire sparkle.
The natural ironstone matrix adds earthy contrast and texture, while the back reveals more green tones for a double‑sided finish full of character.
With brightness 3, the colour play is lively yet balanced - a beautiful example of boulder opal’s organic charm.
The freeform shape gives it a modern, artisan feel, and the adjustable leather cord makes it easy to wear at different lengths.
A one‑of‑a‑kind piece sourced directly from the miner, perfect for anyone who loves opal’s natural artistry.
- Opal Type: Boulder Opal
- Format: Solid
- Colour: Green
- Pattern: Pinfire (tribal‑style)
- Shape: Freeform
- Finish: Polished
- Brightness: B3 (of 5)
- Stone Dimensions: 27 × 18 × 5 mm
- Weight: 6 g
- Back: Double‑sided with visible green tones
- Fitting: Adjustable leather cord
- 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