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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.
Yowah is an outback town and locality in the Shire of Paroo, Queensland, Australia. [2] [3] In the 2021 census, the locality of Yowah had a population of 126 people.[1]The town is known for its opal mining and numerous opal fields that lie around the town as well as the "Yowah nut", a local type of opal distinctive to the region.
Opal from Yowah, Queensland, Australia Camera data. Camera Canon EOS 400D; Lens Canon EF 70-200mm f4L w/ 36mm + 24mm + 12mm extension tubes; Flash Shoot Through Umbrella; Focal length 94 mm; Aperture f/11; Exposure time 1/200 s; Sensivity ISO 400; Date: 2 February 2009: Source: Own work, specimen from the Willems Miner Collection: Author: JJ ...
Polished opal from Yowah. Adavale was the location of Australia's first opal discovery. [9] The town of Yowah is built on an opal field which began producing opals in the 1870s. [24] Opals are also found at Koroit opal field, Quilpie, Eulo and in northern New South Wales.
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The world's largest and most valuable gem opal "Olympic Australis" was found in August 1956 at the "Eight Mile" opal field in Coober Pedy. It weighs 17,000 carats (3.4 kg; 7.5 lb) and is 11 inches (280 mm) long, with a height of 4 + 3 ⁄ 4 in (120 mm) and a width of 4 + 1 ⁄ 2 in (110 mm).
Koroit is close to the town of Yowah which also produces a similar type of opal. 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]
As a whole, the formation primarily consists of thinly bedded medium to fine sandstone, siltstone and mudstone, with sporadic coal seams. In the vicinity of Lightning Ridge, it is divided up into two informal members the underlying Wallangulla Sandstone Member which primarily consists of red fine grained sandstone, light siltstone and grey claystone and is up to 30 metres (98 ft) thick while ...