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The Olympic Australis Opal is believed to be the largest gem opal ever found, and it was found at Coober Pedy.
Found in 1956 at the "Eight Mile" opal field in Coober Pedy, South Australia, the Olympic Australis Opal was found at a depth of 30 feet and so named because the Olympic Games were being held in Melbourne at the time.
The Olympic Australis consists of 99% gem opal, with the remainder of 1% being the soil still attached to the stone. It weighs 17,000 carats (3450 grams) and is 280 mm long (11 inches) by 120 mm, by 115 mm. It was valued at AUD$2,500,000 in 2005.
Wiki User
∙ 13y ago
Wiki User
∙ 13y agoConsidered the largest and most valuable gem opal ever found is the "Olympic Australis" opal found in 1956 in Austrailia. This opal weighs 17000 carats (3450 grams) and measures 11 inches long, 4 and three quarters of an inch high and 4 and one half inches wide.
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Are there different kinds of opal?
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Is biggest a noun?
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How many types of opals are there?
There are 5 basic types of opal. These types are Peruvian Opal, Fire Opal, Girasol Opal, Common opal and Precious Opal.
What is the difference between an Australian opal and an Ethiopian opal?
An Ethiopian opal is an opal-CT, whereas an Australian opal is an opal-A. The Ethiopian opal is made up of leptospheres, instead of small amorphous silica spheres like the Australian opal.
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