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
Matrix Boulder Opal Necklace – Green, Purple & Orange Pinfire (Double‑Sided)
Matrix Boulder Opal Necklace – Green, Purple & Orange Pinfire (Double‑Sided)
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The Prismweave Mosaic - A vibrant matrix boulder opal alive with intricate swirls, circles and shifting colours, its bright green, purple and orange pinfire sparkling like a tiny woven galaxy captured inside stone.
This polished matrix‑conglomerate boulder opal necklace shows a vibrant mix of green, purple and orange pinfire across its freeform surface.
With brightness 4, the colours sparkle clearly as the stone moves, creating a lively, eye‑catching shimmer.
The natural matrix pattern gives it a textured, mosaic‑like look, while the double‑sided finish means it’s beautiful from every angle.
Smooth, colourful and full of character, it’s finished on an adjustable leather cord and sourced directly from the miner - a unique Australian opal with a warm, artisan feel.
- Opal Type: Boulder Opal
- Format: Solid
- Colour: Green, Purple, Orange
- Pattern: Pinfire (matrix conglomerate)
- Shape: Freeform
- Finish: Polished
- Brightness: B4 (of 5)
- Stone Dimensions: 33 × 19 × 4 mm
- Weight: 7 g
- Back: Double‑sided
- Fitting: Leather cord (adjustable)
- 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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Ethical Opal Sourcing
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Caring for Australian Opal
A simple guide -
Opal Brightness Guide
Judging brightness