Uploaded July 2019 | Updated September 2026, 2 weeks ago

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Opal matrix Boulder with rainbow colors | #Opal #Australia

From: Yowah, Queensland, Australia

Opal is a hydrated amorphous form of silica; its water content may range from 3 to 21% by weight, but is usually between 6 and 10%.

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

Welo Opal : What Is Welo Opal? Where Can You Find Welo Opal? : geologypage.com/2019/07/welo-opal-what-is-welo-opal-where-can-you-find-welo-opal.html

Why is Australian Opal Unique? : geologypage.com/2017/08/australian-opal-unique.html

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