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 on the entire global stone market!

It has many opalescent patterns - it shines in many bright colors

This Boulder Opal Donut from Queensland (Australia) is AAA quality - it is perfectly cut & polished

Very large & thick - more shatter-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 the Boulder Opal

"The boulder opal comes from the Queensland region of Australia. More specifically, the boulder opal is found in southwest Queensland, namely in Quilpie, Yowah and Eromanga.
The sedimentary rock in this region dates back to the Cretaceous period. The rock therefore dates from a time that began around 145 million years ago with the end of the Jurassic period and ended around 66 million years ago with the beginning of the Paleogene period. As time went on, weathering processes – well into the Tertiary period – released silica from the sea mud and its microorganisms, which was deposited in the watertight cracks and fissures in the rock. The constant change in moisture and subsequent evaporation eventually led to the silica solidifying and thus to the beautiful opal."


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"A stone is the condensed history of the universe"

~Art of Nature Berlin~