We come to one of our very newest and rarest stones in our shop ~ BOULDER OPAL ~ including 1.5mm leather cord in antique brown for knotting.
One of the most special donuts in the entire global stone market!

It has many opalescent rare patterns & veins - it shines opalescent in many colors
This Boulder Opal Donut from Queensland (Australia) has AAA quality - it is perfectly cut & polished - rarely seen such a wonderful rarity :)
Also very large & thick - more break-proof!

Donuts are the most complex stone shape to produce & each one is cut by hand!


Size: 40 x 8 mm (very large & thick!)



Origin of Boulder Opal

"The Boulder Opal comes from the Queensland region of Australia. More specifically, the Boulder Opal is found in southwest Queensland in Quilpie, Yowah and Eromanga.
The sedimentary rocks in this region date back to the Cretaceous period. The rock therefore comes from a period that began around 145 million years ago at the end of the Jurassic period and ended around 66 million years ago at the beginning of the Paleogene. Over the course of time - well into the Tertiary period - weathering processes released silica from the marine mud with its microorganisms, which was deposited in the water-impermeable rock crevices and cracks. The constant change of moisture and subsequent evaporation ultimately led to the solidification of the silica and thus the beautiful opal."


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"A stone is the condensed history of the universe"

~Art of Nature Berlin~