Uploaded July 2020 | Updated September 2026, 2 weeks ago

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#Geology #Opal #GeologyPage #Minerals

9.6 cm Boulder Opal from Queensland, Australia 😍

Boulder opal consists of concretions and fracture fillings in a dark siliceous ironstone matrix. It is found sporadically in western Queensland, from Kynuna in the north, to Yowah and Koroit in the south. Its largest quantities are found around Jundah and Quilpie in South West Queensland. Australia also has opalized fossil remains, including dinosaur bones in New South Wales and South Australia, and marine creatures in South Australia.

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What Is Opal?
geologypage.com/2015/08/what-is-opal.html

Why is Australian Opal Unique?
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Cantera Opal : What is Cantera Opal ? How Cantera Opal is formed ?
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Geology Page
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