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Polished opal from Yowah (Yowah Nut [23]), Queensland Boulder opal, Carisbrooke Station near Winton, Queensland The primary sources of opal are Australia and Ethiopia, but because of inconsistent and widely varying accountings of their respective levels of extraction, it is difficult to accurately state what proportion of the global supply of ...
The Koroit opal field is known for the very distinctive type of boulder opal that is found in its mines. In Queensland boulder opal is found within a 300 km wide belt of sedimentary rocks in the Winton Formation. Here opal is found as a kernel in small concretions. [1] The Koroit Opal field was discovered in 1897 by Lawrence Rostron.
Boulder opal, oil and gas mining are major secondary industries for the local economy. The majority of the employees of these industries are local residents, with low rates of both unemployment and itinerant work. Quilpie has one opal mining field; Toompine Field is located between Quilpie and Yowah.
This page was last edited on 22 January 2007, at 11:56 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
The Yowah opal field in the Shire of Paroo. The Yowah nut is a type of precious opal, found within the Yowah opal fields situated in Yowah, Shire of Paroo, South West Queensland, Australia since the latter part of the 19th century. [1] These opals are known for their distinctive nut-like shape, opalescent patterns, and vibrant colours.
Archaic people built structures with stone walls. The Roxborough residents accessed two quarries within Roxborough's Hogback region to create tools in the early Archaic period through later periods. There were a number of quarries found within Roxborough that, depending upon the site, contained jasper, opal, petrified wood and quartzite. [11]
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