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
Freeform Boulder Opal Necklace - White Opal with Multicolour Flash
Freeform Boulder Opal Necklace - White Opal with Multicolour Flash
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Earthrise - A boulder opal that looks like colourful white opal bubbling up from the depths of the earth, the bright flashes rising through the stone like molten light pushing toward the surface. The gradient from white and multicoloured fire feels geological and alive - like watching a glowing core break through rock and reveal its hidden colours.
This beautiful Australian Boulder Opal necklace features a rare white‑opal face with flashes of orange, red, yellow, green and blue, blending into a multicoloured opal section at the bottom.
The result is a stunning gradient of colour and light - a natural artwork formed deep within Queensland’s opal fields.
Cut into a freeform shape, polished to a smooth finish, and drilled for a leather cord fitting, this pendant combines earthy authenticity with vibrant opal fire.
Ethically sourced directly from the miner, it’s a one‑of‑a‑kind piece that celebrates the beauty of natural opal variation.
- Opal Type: Natural Boulder Opal
- Origin: Queensland, Australia
- Dimensions: 26 x 18 x 5 mm
- Weight: 6 g
- Colour Play: White base with orange, red, yellow, green & blue flashes
- Pattern: Broad Flash
- Brightness: B4 (of 5)
- Shape: Freeform
- Finish: Polished
- Fitting: Leather cord
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Style: Natural, boho, earthy
- 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