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Andamooka Opal, presented to Queen Elizabeth II, also known as the Queen's Opal; Flame Queen Opal; Galaxy Opal; Halley's Comet Opal, the world's largest uncut black opal; Olympic Australis Opal, reported to be the largest and most valuable gem opal ever found
Andamooka in South Australia is also a major producer of matrix opal, crystal opal, and black opal. Another Australian town, Lightning Ridge in New South Wales , is the main source of black opal, opal containing a predominantly dark background (dark gray to blue-black displaying the play of color), collected from the Griman Creek Formation . [ 30 ]
Coober Pedy (/ ˈ k uː b ər ˈ p iː d i /) is a town in northern South Australia, 846 km (526 mi) north of Adelaide on the Stuart Highway.The town is sometimes referred to as the "opal capital of the world" because of the quantity of precious opals that are mined there.
Zinc – Australia was third to China and Peru in zinc production in 2019, producing 1.3 million tonnes, 10% of world production. [42] Coal – Australia is the world's largest exporter of coal and fourth largest producer of coal behind China, USA and India. [43] Oil shale – Australia has the sixth largest defined oil shale resources. [44]
The Olympic Australis opal is the largest and most valuable opal yet found (as of 1961) [1] and was valued at A$2,500,000 in 1997. [2] It was found in 1956 at the 'Eight Mile' opal field near the town of Coober Pedy in South Australia. [3] The opal was found at a depth of 9.1 metres (30 ft).
The Argyle Diamond Mine was a diamond mine located in the East Kimberley region in the remote north of Western Australia. Argyle was at times the largest diamond producer in the world by volume (14 million carats in 2018 [ 1 ] ), although the proportion of gem-quality diamonds was low.
The discovery of diamonds at Ellendale proved that lamprorites could also produce diamonds, and this led to intense worldwide diamond exploration. This led to the subsequent discovery of the Argyle lamprorite diamond mine, famous for its fancy pink diamonds about 420 km to the north east of Ellendale. The initial discovery of diamonds at ...
The Fire of Australia opal is a 998 gram uncut opal mined by Walter Bartram in 1946 at the Eight Mile field in Coober Pedy, South Australia. [1] [2] The opal is just under 5,000 carats; roughly equivalent in size to two cricket balls. [1] Although rough-cut, it is polished on two sides. [3] Due to the evaporation of an inland sea several ...