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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).
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.
It's valued at over $1 million and was purchased by the South Australian Museum in Adelaide which will be presenting it as part of their "Opals" exhibit to celebrate 100 years of gemstone mining ...
Conversely, the jewellery industry in the early 20th century launched a campaign to popularise wedding rings for men, which caught on, as well as engagement rings for men, which did not, go so far as to create a false history and claim that the practice had medieval roots. By the mid-1940s, 85% of weddings in the U.S. featured a double-ring ...
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 ]
English: This chart shows the nominal price of gold along with the price in 1971 and 2011 dollars (adjusted based on the consumer price index). The historical gold price was obtained from www.igolder.com; CPI was obtained from www.rateinflation.com. The data is in section Chart Data.
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 ...
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