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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).
It is the largest and one of the most valuable opals mined to date, consisting of 99 per cent gem opal (the other 1 per cent being soil). The Olympic Australis measures 11 inches in length, 4 + 3 ⁄ 4 inches height, 4 + 1 ⁄ 2 inches in width, and weighs 17,000 carats (3,450 g, 121.7 oz, or 7.6 lb).
In fact, as it gets darker around the opal, the opal appears ever more vibrant. The stone's vivid and sparkly nature is in stark contrast to Coober Pedy, Australia where it was discovered.
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 million years ago, South Australia is one of the few places on Earth where opals of this size can be created.
Australian opal has been cited as accounting for 95–97% of the world's supply of precious opal, [24] [25] with the state of South Australia accounting for 80% of the world's supply. [26] In 2012, Ethiopian opal production was estimated to be 14,000 kg (31,000 lb) by the United States Geological Survey. [ 27 ]
At 43, Rohan Bopanna became the oldest man to win a Grand Slam doubles title in the Open era when he combined with Matt Ebden on Saturday for a 7-6 (0), 7-5 victory over Simone Bolelli and Andrea ...
Opal is a variety of low-aromatic 91 RON petrol developed in 2005 by BP Australia to combat the rising use of gasoline as an inhalant in remote Indigenous Australian communities. [ 1 ] Though more expensive to produce, requiring a $0.33/litre Federal subsidy, a 2006 report found it would likely save at least $27 million per year when the social ...
It was found at Lightning Ridge, New South Wales, Australia, by the Lunatic Hill Mining Syndicate. It weighs 1,982.5 carats (396.5 g; 13.99 oz) and is about the size of a man's fist. [ 1 ] The Halley's Comet Opal is a very fine specimen, with few flaws or blemishes and a large green and orange 1.6 cm (0.63 in) thick color bar which goes through ...