English gold coins intended for circulation from 1526 into the 1930s were typically a standard 22k alloy called crown gold,[135] for hardness (American gold coins for circulation after 1837 contain an alloy of 0.900 fine gold, or 21.6 kt).[136]. No other isomer or isotope of gold has three decay paths. [108] These Witwatersrand rocks are exposed at the surface on the Witwatersrand, in and around Johannesburg, but also in isolated patches to the south-east and south-west of Johannesburg, as well as in an arc around the Vredefort Dome which lies close to the center of the Witwatersrand basin. Colloidal gold preparations (suspensions of gold nanoparticles) in water are intensely red-colored, and can be made with tightly controlled particle sizes up to a few tens of nanometers across by reduction of gold chloride with citrate or ascorbate ions. This property has been used to refine gold and to confirm the presence of gold in metallic objects. [103], The World Gold Council states that as of the end of 2017, "there were 187,200 tonnes of stocks in existence above ground". It is estimated that 16% of the world's presently-accounted-for gold and 22% of the world's silver is contained in electronic technology in Japan.[159]. But they're more precious for the global economy than for human health. Gold dissolves in mercury, forming amalgam alloys, but this is not a chemical reaction. But since nearly one billion cell phones are produced each year, a gold value of 50 cents in each phone adds to $500 million in gold from just this application. The asteroid that formed Vredefort crater 2.020 billion years ago is often credited with seeding the Witwatersrand basin in South Africa with the richest gold deposits on earth. The gold-bearing minerals that contain. it is a native element, of the isometric system. Sind Sie mit der Bestelldauer des entsprechenden Produkts OK? Switzerland was the last country to tie its currency to gold; it backed 40% of its value until the Swiss joined the International Monetary Fund in 1999.[133]. Fine gold wires are used to connect semiconductor devices to their packages through a process known as wire bonding. [21] This color is determined by the frequency of plasma oscillations among the metal's valence electrons, in the ultraviolet range for most metals but in the visible range for gold due to relativistic effects affecting the orbitals around gold atoms. In general, gold concentrations for south Atlantic and central Pacific samples are the same (~50 femtomol/L) but less certain. [131] From an earlier preference in using silver, European economies re-established the minting of gold as coinage during the thirteenth and fourteenth centuries.[132]. The first known coins containing gold were struck in Lydia, Asia Minor, around 600 BC. [22][23] Similar effects impart a golden hue to metallic caesium. Mining is the extraction of valuable minerals or other geological materials from the Earth, usually from an ore body, lode, vein, seam, reef or placer deposit.These deposits form a mineralized commodity that is of economic interest to the miner. gold, silver) and some are not. A Gold nugget is usually 70 to 95 percent gold, and the remainder mostly silver. Christie, A and Brathwaite, R. (Last updated 2 November 2011), Learn how and when to remove this template message, "Atomic weights of the elements 2013 (IUPAC Technical Report)", 10.1002/(SICI)1521-3773(19991102)38:21<3194::AID-ANIE3194>3.0.CO;2-O, "Gold Mining Boom Increasing Mercury Pollution Risk", "Synthesis and modelling of the mechanical properties of Ag, Au and Cu nanowires", "Largest Private Refinery Discovers Gold-Plated Tungsten Bar | Coin Update", "Austrians Seize False Gold Tied to London Bullion Theft", https://web.archive.org/web/20041110193206/http://library.lanl.gov/cgi-bin/getfile?rc000062.pdf, "Effects of relativistic motion of electrons on the chemistry of gold and platinum", 10.1002/1521-3749(200109)627:9<2112::AID-ZAAC2112>3.0.CO;2-2, "Earth's Gold Came from Colliding Dead Stars", "Nucleosynthesis of Heavy Elements by Neutron Capture", "LIGO and Virgo make first detection of gravitational waves produced by colliding neutron stars", "Neutron star mergers may create much of the universe's gold", "Original size of the Vredefort Structure: Implications for the geological evolution of the Witwatersrand Basin", "Scientists reveals the mystery about the origin of gold", "Plume-subduction interaction forms large auriferous provinces", "Environment & Nature News – Bugs grow gold that looks like coral", "Earthquakes Turn Water into Gold|18 March 2013", "Concentration of gold in natural waters", "A Case for the World's Oldest Coin: Lydian Lion", "Kingdom of Mali – Primary Source Documents", "Yearly Gold Production in metric tonnes (1900–2004)", Jewelrymaking Through History: An Encyclopedia, "Israeli dig unearths large trove of early Islamic gold coins", "China now world's largest gold producer; foreign miners at door", "Removal of Barriers to the Abatement of Global Mercury Pollution from Artisanal Gold Mining", "Gold Demand Trends | Investment | World Gold Council", "Gold mine production costs up by 17% in 2006 while output fell", "It's official: China overtakes India as top consumer of gold", Summit declaration, Peoples' Gold summit, San Juan Ridge, California in June 1999, Cyanide spills from gold mine compared to Chernobyls nuclear disaster, Behind gold's glitter, torn lands and pointed questions, "Pollution from Artisanal Gold Mining, Blacksmith Institute Report 2012", "Swiss Narrowly Vote to Drop Gold Standard", "World Gold Council > value > research & statistics > statistics > supply and demand statistics", "historical charts:gold – 1833–1999 yearly averages", "PRECIOUS METALS: Comex Gold Hits All-Time High", "Gold futures hit closing record as investors fret rescue deal", "Gold hits record, oil jumps with Libya unrest", "Gold Extends Biggest Decline in 18 Months After CME Raises Futures Margins", "Financial Planning|Gold starts 2006 well, but this is not a 25-year high! as a gold silver alloy). Gold is a mineral. Some 22% of all the gold that is ascertained to exist today on Earth has been extracted from these Witwatersrand rocks. [65] As of 1990, gold artifacts found at the Wadi Qana cave cemetery of the 4th millennium BC in West Bank were the earliest from the Levant. In its purest form, it is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal. [19] By comparison, the density of lead is 11.34 g/cm3, and that of the densest element, osmium, is 22.588±0.015 g/cm3.[20]. A few metals, such as gold, silver, and copper can be found in pure form as metal elements. Demand in the first quarter of 2014 pushed turnover to $23.7 billion according to a World Gold Council report. Gold in its natural mineral form almost always has traces of silver, and may also contain traces of copper and iron. Native silver is sometimes found in the oxidized zones above the ores of other metals. At 10 parts per quadrillion the Earth's oceans would hold 15,000 tonnes of gold. 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