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Olympic Australis Opal
The Olympic Australis opal is the largest and most valuable opal yet found () and was valued at in 1997. It was found in 1956 at the 'Eight Mile' opal field near the town of Coober Pedy in South Australia. The opal was found at a depth of . The Olympic Australis opal was named in honor of the Olympic Games, which were being held in Melbourne in the year of the opal's discovery. It consists of 99% gem opal with an even colour throughout the stone, and has been left in a natural state, unpolished and uncut with blemishes. Olympic Australis is 280 mm long, 120 mm thick, and 115 mm wide (11 in long, 4.75 in thick, and 4.5 in wide). It weighs 17,000 carats (3450 g/121.7 oz/7.6 lbs). , the opal is kept in Sydney, at the offices of Altmann & Cherny Ltd.Allan W. Eckert; ''The world of opals'' John Wiley and Sons, 1997 p100 See also * List of individual gemstones Other notable individual opals: * Andamooka Opal * Galaxy Opal * Glorious Jubilee * Flame Queen Opal * H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Opal
Opal is a hydrated amorphous form of silica (SiO2·''n''H2O); its water content may range from 3 to 21% by weight, but is usually between 6 and 10%. Due to its amorphous property, it is classified as a mineraloid, unlike crystalline forms of silica, which are considered minerals. It is deposited at a relatively low temperature and may occur in the fissures of almost any kind of rock, being most commonly found with limonite, sandstone, rhyolite, marl, and basalt. The name ''opal'' is believed to be derived from the Sanskrit word (), which means 'jewel', and later the Greek derivative (), which means 'to see a change in color'. There are two broad classes of opal: precious and common. Precious opal displays play-of-color ( iridescence); common opal does not. Play-of-color is defined as "a pseudo chromatic optical effect resulting in flashes of colored light from certain minerals, as they are turned in white light." The internal structure of precious opal causes it to di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coober Pedy
Coober Pedy () is a town in northern South Australia, 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. Coober Pedy is renowned for its below-ground dwellings, called " dugouts", which are built in this fashion due to the scorching daytime heat. The name "Coober Pedy" is thought to derive from the Aboriginal term ''kupa-piti'', which means "whitefellas' hole", but in 1975 the local Aboriginal people of the town adopted the name Umoona, which means "long life" and is also their name for the mulga tree. In the 2016 Australian census, there were 1,762 people in Coober Pedy. History Aboriginal peoples have a long-standing connection with the area. Coober Pedy is considered by the senior Western Desert people to be the traditional lands of the Arabana people country, but Kokatha and Yankunytjatjara people are also closely attached to some ceremonial ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South Australia
South Australia (commonly abbreviated as SA) is a state in the southern central part of Australia. It covers some of the most arid parts of the country. With a total land area of , it is the fourth-largest of Australia's states and territories by area, and second smallest state by population. It has a total of 1.8 million people. Its population is the second most highly centralised in Australia, after Western Australia, with more than 77 percent of South Australians living in the capital Adelaide, or its environs. Other population centres in the state are relatively small; Mount Gambier, the second-largest centre, has a population of 33,233. South Australia shares borders with all of the other mainland states, as well as the Northern Territory; it is bordered to the west by Western Australia, to the north by the Northern Territory, to the north-east by Queensland, to the east by New South Wales, to the south-east by Victoria, and to the south by the Great Australian Bight.M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Olympic Games
The modern Olympic Games or Olympics (french: link=no, Jeux olympiques) are the leading international sporting events featuring summer and winter sports competitions in which thousands of athletes from around the world participate in a variety of competitions. The Olympic Games are considered the world's foremost sports competition with more than 200 teams, representing sovereign states and territories, participating. The Olympic Games are normally held every four years, and since 1994, have alternated between the Summer and Winter Olympics every two years during the four-year period. Their creation was inspired by the ancient Olympic Games (), held in Olympia, Greece from the 8th century BC to the 4th century AD. Baron Pierre de Coubertin founded the International Olympic Committee (IOC) in 1894, leading to the first modern Games in Athens in 1896. The IOC is the governing body of the Olympic Movement (which encompasses all entities and individuals involved in the Oly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1956 Summer Olympics
The 1956 Summer Olympics, officially known as the Games of the XVI Olympiad, were an international multi-sport event held in Melbourne, Victoria, Australia, from 22 November to 8 December 1956, with the exception of the equestrian events, which were held in Stockholm, Sweden, in June 1956. These Games were the first to be staged in the Southern Hemisphere and Oceania, as well as the first to be held outside Europe and North America. Melbourne is the most southerly city ever to host the Olympics. Due to the Southern Hemisphere's seasons being different from those in the Northern Hemisphere, the 1956 Games did not take place at the usual time of year, because of the need to hold the events during the warmer weather of the host's spring/summer (which corresponds to the Northern Hemisphere's autumn/winter), resulting in the only summer games ever to be held in November and December. Australia did not host the Games again until 2000 in Sydney, New South Wales, and will host them ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Melbourne
Melbourne ( ; Boonwurrung/Woiwurrung: ''Narrm'' or ''Naarm'') is the capital and most populous city of the Australian state of Victoria, and the second-most populous city in both Australia and Oceania. Its name generally refers to a metropolitan area known as Greater Melbourne, comprising an urban agglomeration of 31 local municipalities, although the name is also used specifically for the local municipality of City of Melbourne based around its central business area. The metropolis occupies much of the northern and eastern coastlines of Port Phillip Bay and spreads into the Mornington Peninsula, part of West Gippsland, as well as the hinterlands towards the Yarra Valley, the Dandenong and Macedon Ranges. It has a population over 5 million (19% of the population of Australia, as per 2021 census), mostly residing to the east side of the city centre, and its inhabitants are commonly referred to as "Melburnians". The area of Melbourne has been home to Aboriginal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Individual Gemstones
A number of gemstones have gained fame, either because of their size and beauty or because of the people who owned or wore them. A list of famous gemstones follows. Alexandrites * Smithsonian museums' Alexandrite, the largest cut alexandrite weighing 65.08 carats. Aquamarines A birthstone. * The Dom Pedro – The world's largest cut and polished aquamarine. Housed in the permanent collection of the Houston Museum of Natural Science Diamonds :''See List of diamonds'' Emeralds * Bahia Emerald * Carolina Emperor, 310 carats uncut, 64.8 carats cut; discovered in the United States in 2009, resides in the North Carolina Museum of Natural Sciences, Raleigh * Chalk Emerald * Duke of Devonshire Emerald * Emerald of Saint Louis, 51.60 carats cut; discovered in Austria, probably Habachtal, resides in the National Museum of Natural History, Paris * Gachalá Emerald * Mogul Mughal Emerald * Patricia Emerald, 632 carats uncut, dihexagonal (12 sided); discovered in Colombia in 1920, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Andamooka Opal
The Andamooka Opal is a famous opal which was presented to Queen Elizabeth II in 1954 on the occasion of her first visit to South Australia. The opal was mined in Andamooka in 1949. The opal was cut and polished by John Altmann to a weight of . It displays a magnificent array of reds, blues, and greens and was set with diamonds into an 18 karat (75%) palladium necklet. See also * List of individual gemstones Other notable individual opals: * Galaxy Opal * Glorious Jubilee * Flame Queen Opal The Flame Queen Opal is perhaps the most famous of all opals. It is the best-known example of “eye-of-opal”, an eye-like effect created when opal in-fills a cavity. The Flame Queen's flat central raised dome flashes red or gold depending on t ... * Halley's Comet Opal * Olympic Australis Opal References Individual opals {{gemology-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galaxy Opal
The Galaxy Opal is the world's largest polished opal, certified by the Guinness Book of World Records in 1992."The Guinness book of records, 1993" October 1992, p.22/ref> It was found at the Boi Morto Mine in Brazil in 1976. The finished opal weighs approximately 3,749 carats, or 0.75 kg. It was carved from a grapefruit-sized piece of rough stone weighing 5,205 carats by Scott Cooley into a shape resembling a child's head. The weight of the finished stone was beyond the capacity of any gem measuring scale at the Gemological Institute of America and an approximation of its weight in carats had to be determined using a postal scale. The stone measures 14.0 x 10.2 x 4.1 cm (5-1/2 x 4 x 1-5/8 in). It is currently part of a private collection. See also * List of individual gemstones Other notable individual opals: * Andamooka Opal * Flame Queen Opal The Flame Queen Opal is perhaps the most famous of all opals. It is the best-known example of “eye-of-opal”, an eye-like ef ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flame Queen Opal
The Flame Queen Opal is perhaps the most famous of all opals. It is the best-known example of “eye-of-opal”, an eye-like effect created when opal in-fills a cavity. The Flame Queen's flat central raised dome flashes red or gold depending on the angle of view, and is surrounded by a band of deep blue-green, giving the stone an appearance somewhat like that of a fried egg. The Flame Queen weighs and is somewhat triangular in shape, measuring 7.0 x 6.3 x 1.2 centimeters (2.75 x 2.50 x .50 inches). The Flame Queen was discovered in 1914 by three partners: Jack Philips, Walter Bradley and “Irish” Joe Hegarty, at the Bald Hill Workings, Lightning Ridge, New South Wales, Australia. Tunneling down at around revealed no trace of the tell-tale coloring in the clay that indicates the likely presence of opal. However, despite the poor ventilation and the constant danger of tunnel collapse, Bradley and Philips wanted to continue digging. At , Bradley's pick found a large, blac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Halley's Comet Opal
The Halley's Comet Opal is the largest uncut black opal in the world, according to the Guinness Book of World Records. It is so named because it was unearthed in 1986, a year when Halley's Comet could be seen from Earth. It is the third largest gem grade black opal ever recorded, the largest one extant, and the largest specimen ever found in its region. It was found at Lightning Ridge, New South Wales, Australia by the Lunatic Hill Mining Syndicate. It weighs (13.99 ounces) and is about the size of a man's fist. The Halley's Comet Opal is a very fine specimen, with few flaws or blemishes and a large green and orange thick color bar which goes through the opal. Formed about 20 million years ago, it is an example of a nobby, which is a natural lump-shaped opal found only at Lightning Ridge. As of 2006 it was for sale at $1.2 million. See also * List of individual gemstones A number of gemstones have gained fame, either because of their size and beauty or because of the pe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Individual Opals
An individual is that which exists as a distinct entity. Individuality (or self-hood) is the state or quality of being an individual; particularly (in the case of humans) of being a person unique from other people and possessing one's own needs or goals, rights and responsibilities. The concept of an individual features in diverse fields, including biology, law, and philosophy. Etymology From the 15th century and earlier (and also today within the fields of statistics and metaphysics) ''individual'' meant " indivisible", typically describing any numerically singular thing, but sometimes meaning "a person". From the 17th century on, ''individual'' has indicated separateness, as in individualism. Law Although individuality and individualism are commonly considered to mature with age/time and experience/wealth, a sane adult human being is usually considered by the state as an "individual person" in law, even if the person denies individual culpability ("I followed instruct ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
