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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.
Polished opal from Yowah (Yowah Nut [22]), 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 ...
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.
Opal green: RAL 6027: Light green: RAL 6028: Pine green: RAL 6029: Mint green: Some units of Bundesgrenzschutz from 1994 to 2005 ... Code Hue Lightness Chromaticity ...
Boulder opal is very distinct from solid opal and should eventually have it's own article. SauliH 07:43, 22 January 2007 (UTC) [ reply ] Boulder opal is indeed a different "animal" and certainly deserves it's own article, SauliH T.E. Goodwin 23:20, 30 September 2007 (UTC) [ reply ]
The Clinton erratic is a greenstone boulder with north-south glacial striations, at the corner of Conrad St and Berg Road above the ferry terminal in the town of Clinton. The rock and Coupeville's Big Rock were used to calibrate 36 Cl radiometric dating due to the well established date they were deposited and began to receive cosmic ray ...