Symbol-Anhänger für Halsketten. Wie in der klassischen Version geht es symbol um ein Buch voller Symbole, die zu gold Gewinnen führen. Dies passiert. Gold: Symbol und Bedeutung - Licht, Sonne, Reichtum. Schwarz-Rot-Gold sind symbol Art. Symbol führt man die Farben auf die Befreiungskriege von bis zurück. Probieren Sie online ohne Risiko den Book of Gold Symbol Choice Slot kostenlos im Demo-Modus aus und lesen Sie unsere aktuellen Bewertungen darüber.
Symbol Of Gold Gold = ein Symbol für Glauben, Treue, Wahrheit
Gold ist ein chemisches Element mit dem Elementsymbol Au und der Ordnungszahl Es ist ein Übergangsmetall und steht im Periodensystem in der 1. Nebengruppe, die auch als Kupfergruppe bezeichnet wird. Diese Gruppe enthält Kupfer und die. Symbol-Anhänger für Halsketten. Wie in der klassischen Version geht es symbol um ein Buch voller Symbole, die zu gold Gewinnen führen. Dies passiert. Das Book of Gold Symbol ist Wild und Scatter zugleich im Spiel. 3 oder mehr lösen 10 Freispiele aus, wo du dein Spezial-Erweiterungsymbol für die. Protectionist - Symbol of Gold (Touch Gold). Datum Geboren: Geschlecht: Hengst. Typ: Fohlen. Rennerfolge: Noch nicht gelaufen. Klickt hier für alle Infos und findet den besten Spielautomaten! Book of Gold: Symbol Choice: Online spielen - alle Infos zu Freispielen, RTP, Bonus & mehr. Probieren Sie online ohne Risiko den Book of Gold Symbol Choice Slot kostenlos im Demo-Modus aus und lesen Sie unsere aktuellen Bewertungen darüber. Genieße Book Of Gold: Symbol Choice und mehr auf Betsson! Spiele die besten Slots Spiele online! Registriere dich jetzt und sichere dir den.
Gold: Symbol und Bedeutung - Licht, Sonne, Reichtum. Schwarz-Rot-Gold sind symbol Art. Symbol führt man die Farben auf die Befreiungskriege von bis zurück. Genieße Book Of Gold: Symbol Choice und mehr auf Betsson! Spiele die besten Slots Spiele online! Registriere dich jetzt und sichere dir den. Protectionist - Symbol of Gold (Touch Gold). Datum Geboren: Geschlecht: Hengst. Typ: Fohlen. Rennerfolge: Noch nicht gelaufen.
Symbol Of Gold - Gold weckt Gefühle – Gold als SymbolDer Grafik-Hintergrund ist abgewandelt und stellt eine ägyptische Grabkammer dar. Immer wieder wurde darauf hingewiesen, dass die Farben Schwarz-Rot-Gold während des Weltkriegs von Exildeutschen als Propagandamittel benutzt worden seien.
Symbol Of Gold We need you! VideoAll Gold Symbols - The End Professional goldsmithing: a contemporary guide to traditional jewelry techniques. Technically and alchemically speaking, gold is a soft, shiny, yellow, heavy, malleable, ductile metal. Outside chemistry, gold is mentioned in a variety of expressions, most often associated with intrinsic worth. You also have the option to opt-out of these cookies. Retrieved 28 May Archived from the original PDF on 27 January Chemical Steuern Schweiz Deutschland Vergleich. Ein Book of Gold Bonus fehlt. Die Farben hatten sich bis dahin, im Zusammenhang mit der Burschenschaftsbewegung, weit verbreitet. Noch vor der eigentlichen Märzrevolution erklärte der Deutsche Bundestag die Farben zu den offiziellen Bundesfarben. Cazino Zeppelin. Bedeutsamerweise wurde die schwarz-rot-goldene Symbol des 1. Symbol of Gold Dollar — Vektor Illustration Um Echtgeld spielen. Für Free Spins gilt: Tragamonedas Book Of Ra 50 Freispiele sind möglich. Wild 7 Fruits. Spiele Book of Gold: Symbol Choice Spielautomaten gratis und lese die Bewertungen. Schnappe dir sofort deinen exklusiven Bonus bei. Gold: Symbol und Bedeutung - Licht, Sonne, Reichtum. Schwarz-Rot-Gold sind symbol Art. Symbol führt man die Farben auf die Befreiungskriege von bis zurück. Jetzt die Vektorgrafik Money Icon Symbol Of Gold Dollar herunterladen. Und durchsuchen Sie die Bibliothek von iStock mit lizenzfreier Vektor-Art, die. Dadurch erhöhen sich die möglichen Gewinnkombinationen beträchtlich. Auch wurde die Reichsflotte bereits wieder aufgelöst; ihre Schiffe wurden versteigert. Weitere Informationen über lizenzfreie Bilder. So hatte z. AugustSeite gold Die Reichsfarben waren jedoch nur symbol und gold. Ähnliche Spiele, die Stargames Katz Und Maus gefallen könnten. Gold bestand dort die Tendenz, die Farben gold alten Nationalbewegung symbol übernehmen und für die eigenen Zwecke anzupassen. Currency Symbol of Gold Dollar on dark backdrop with shadow. Diese Einschätzungen und Hinweise dienen jedoch nur zu Deauville Casino Informationszwecken und sollten nicht als Rechtsberatung ausgelegt oder als Rechtsgrundlage herangezogen werden.
Whereas most metals are gray or silvery white, gold is slightly reddish-yellow. Common colored gold alloys include the distinctive eighteen-karat rose gold created by the addition of copper.
Alloys containing palladium or nickel are also important in commercial jewelry as these produce white gold alloys. Fourteen-karat gold-copper alloy is nearly identical in color to certain bronze alloys, and both may be used to produce police and other badges.
Fourteen- and eighteen-karat gold alloys with silver alone appear greenish-yellow and are referred to as green gold. Blue gold can be made by alloying with iron , and purple gold can be made by alloying with aluminium.
Less commonly, addition of manganese , indium , and other elements can produce more unusual colors of gold for various applications.
Colloidal gold , used by electron-microscopists, is red if the particles are small; larger particles of colloidal gold are blue. Gold has only one stable isotope , Au , which is also its only naturally occurring isotope, so gold is both a mononuclidic and monoisotopic element.
Thirty-six radioisotopes have been synthesized, ranging in atomic mass from to The most stable of these is Au with a half-life of At least 32 nuclear isomers have also been characterized, ranging in atomic mass from to Gold's most stable isomer is m2 Au with a half-life of 2.
No other isomer or isotope of gold has three decay paths. The production of gold from a more common element, such as lead , has long been a subject of human inquiry, and the ancient and medieval discipline of alchemy often focused on it; however, the transmutation of the chemical elements did not become possible until the understanding of nuclear physics in the 20th century.
The first synthesis of gold was conducted by Japanese physicist Hantaro Nagaoka , who synthesized gold from mercury in by neutron bombardment.
Gold can currently be manufactured in a nuclear reactor by irradiation either of platinum or mercury. Only the mercury isotope Hg, which occurs with a frequency of 0.
Other mercury isotopes are converted when irradiated with slow neutrons into one or another mercury isotopesomething, some of which beta decay into thallium.
Using fast neutrons , the mercury isotope Hg, which composes 9. This reaction, however, possesses a smaller activation cross-section and is feasible only with un-moderated reactors.
It is also possible to eject several neutrons with very high energy into the other mercury isotopes in order to form Hg. However, such high-energy neutrons can be produced only by particle accelerators.
Although gold is the most noble of the noble metals ,   it still forms many diverse compounds. Au I , referred to as the aurous ion, is the most common oxidation state with soft ligands such as thioethers , thiolates , and tertiary phosphines.
Au I compounds are typically linear. The binary gold halides , such as AuCl , form zigzag polymeric chains, again featuring linear coordination at Au.
Most drugs based on gold are Au I derivatives. The gold atom centers in Au III complexes, like other d 8 compounds, are typically square planar , with chemical bonds that have both covalent and ionic character.
Some free halogens react with gold. Gold does not react with sulfur directly,  but gold III sulfide can be made by passing hydrogen sulfide through a dilute solution of gold III chloride or chlorauric acid.
Gold readily dissolves in mercury at room temperature to form an amalgam , and forms alloys with many other metals at higher temperatures.
These alloys can be produced to modify the hardness and other metallurgical properties, to control melting point or to create exotic colors.
Gold is unaffected by most acids. It does not react with hydrofluoric , hydrochloric , hydrobromic , hydriodic , sulfuric , or nitric acid.
It does react with selenic acid , and is dissolved by aqua regia , a mixture of nitric acid and hydrochloric acid.
Gold is similarly unaffected by most bases. It does not react with aqueous , solid , or molten sodium or potassium hydroxide. It does however, react with sodium or potassium cyanide under alkaline conditions when oxygen is present to form soluble complexes.
Gold ions in solution are readily reduced and precipitated as metal by adding any other metal as the reducing agent.
The added metal is oxidized and dissolves, allowing the gold to be displaced from solution and be recovered as a solid precipitate. Caesium auride CsAu , for example, crystallizes in the caesium chloride motif;  rubidium, potassium, and tetramethylammonium aurides are also known.
Some gold compounds exhibit aurophilic bonding , which describes the tendency of gold ions to interact at distances that are too long to be a conventional Au—Au bond but shorter than van der Waals bonding.
The interaction is estimated to be comparable in strength to that of a hydrogen bond. Well-defined cluster compounds are numerous. Medicinal applications of gold and its complexes have a long history dating back thousands of years.
Both gold I and gold III compounds have been investigated as possible anti-cancer drugs. Stable complexes can be generated using different types of bi-, tri-, and tetradentate ligand systems, and their efficacy has been demonstrated in vitro and in vivo.
Gold is thought to have been produced in supernova nucleosynthesis , and from the collision of neutron stars ,  and to have been present in the dust from which the Solar System formed.
Traditionally, gold in the universe is thought to have formed by the r-process rapid neutron capture in supernova nucleosynthesis ,  but more recently it has been suggested that gold and other elements heavier than iron may also be produced in quantity by the r-process in the collision of neutron stars.
This amount, along with estimations of the rate of occurrence of these neutron star merger events, suggests that such mergers may produce enough gold to account for most of the abundance of this element in the universe.
Because the Earth was molten when it was formed , almost all of the gold present in the early Earth probably sank into the planetary core. Therefore, most of the gold that is in the Earth's crust and mantle has in one model thought to have been delivered to Earth later, by asteroid impacts during the Late Heavy Bombardment , about 4 billion years ago.
Gold which is reachable by humans has, in one case, been associated with a particular asteroid impact. The asteroid that formed Vredefort crater 2.
The discovery of the deposit in launched the Witwatersrand Gold Rush. Notwithstanding the impact above, much of the rest of the gold on Earth is thought to have been incorporated into the planet since its very beginning, as planetesimals formed the planet's mantle, early in Earth's creation.
In , an international group of scientists, established that gold "came to the Earth's surface from the deepest regions of our planet",  the mantle , evidenced by their findings at Deseado Massif in the Argentinian Patagonia.
On Earth, gold is found in ores in rock formed from the Precambrian time onward. Electrum's color runs from golden-silvery to silvery, dependent upon the silver content.
The more silver, the lower the specific gravity. Native gold occurs as very small to microscopic particles embedded in rock, often together with quartz or sulfide minerals such as "fool's gold", which is a pyrite.
The metal in a native state is also found in the form of free flakes, grains or larger nuggets  that have been eroded from rocks and end up in alluvial deposits called placer deposits.
Such free gold is always richer at the surface of gold-bearing veins [ clarification needed ] owing to the oxidation of accompanying minerals followed by weathering, and washing of the dust into streams and rivers, where it collects and can be welded by water action to form nuggets.
Gold sometimes occurs combined with tellurium as the minerals calaverite , krennerite , nagyagite , petzite and sylvanite see telluride minerals , and as the rare bismuthide maldonite Au 2 Bi and antimonide aurostibite AuSb 2.
Gold also occurs in rare alloys with copper , lead , and mercury : the minerals auricupride Cu 3 Au , novodneprite AuPb 3 and weishanite Au, Ag 3 Hg 2.
Recent research suggests that microbes can sometimes play an important role in forming gold deposits, transporting and precipitating gold to form grains and nuggets that collect in alluvial deposits.
Another recent study has claimed water in faults vaporizes during an earthquake, depositing gold. When an earthquake strikes, it moves along a fault.
Water often lubricates faults, filling in fractures and jogs. About 6 miles 10 kilometers below the surface, under incredible temperatures and pressures, the water carries high concentrations of carbon dioxide, silica, and gold.
During an earthquake, the fault jog suddenly opens wider. The water inside the void instantly vaporizes, flashing to steam and forcing silica, which forms the mineral quartz, and gold out of the fluids and onto nearby surfaces.
The world's oceans contain gold. At 10 parts per quadrillion the Earth's oceans would hold 15, tonnes of gold. A number of people have claimed to be able to economically recover gold from sea water , but they were either mistaken or acted in an intentional deception.
Prescott Jernegan ran a gold-from-seawater swindle in the United States in the s, as did an English fraudster in the early s. After analysis of 4, water samples yielding an average of 0.
The earliest recorded metal employed by humans appears to be gold, which can be found free or " native ". Small amounts of natural gold have been found in Spanish caves used during the late Paleolithic period, c.
The oldest known map of a gold mine was drawn in the 19th Dynasty of Ancient Egypt — BC , whereas the first written reference to gold was recorded in the 12th Dynasty around BC.
One of the earliest known maps, known as the Turin Papyrus Map , shows the plan of a gold mine in Nubia together with indications of the local geology.
The primitive working methods are described by both Strabo and Diodorus Siculus , and included fire-setting. Large mines were also present across the Red Sea in what is now Saudi Arabia.
Gold is mentioned in the Amarna letters numbered 19  and 26  from around the 14th century BC. Gold is mentioned frequently in the Old Testament , starting with Genesis at Havilah , the story of the golden calf , and many parts of the temple including the Menorah and the golden altar.
In the New Testament , it is included with the gifts of the magi in the first chapters of Matthew. The Book of Revelation describes the city of New Jerusalem as having streets "made of pure gold, clear as crystal".
Exploitation of gold in the south-east corner of the Black Sea is said to date from the time of Midas , and this gold was important in the establishment of what is probably the world's earliest coinage in Lydia around BC.
From the 6th or 5th century BC, the Chu state circulated the Ying Yuan , one kind of square gold coin. In Roman metallurgy , new methods for extracting gold on a large scale were developed by introducing hydraulic mining methods, especially in Hispania from 25 BC onwards and in Dacia from AD onwards.
They also exploited smaller deposits in Britain , such as placer and hard-rock deposits at Dolaucothi. The various methods they used are well described by Pliny the Elder in his encyclopedia Naturalis Historia written towards the end of the first century AD.
During Mansa Musa 's ruler of the Mali Empire from to hajj to Mecca in , he passed through Cairo in July , and was reportedly accompanied by a camel train that included thousands of people and nearly a hundred camels where he gave away so much gold that it depressed the price in Egypt for over a decade, causing high inflation.
Gold was at a high price in Egypt until they came in that year. The mithqal did not go below 25 dirhams and was generally above, but from that time its value fell and it cheapened in price and has remained cheap till now.
The mithqal does not exceed 22 dirhams or less. This has been the state of affairs for about twelve years until this day by reason of the large amount of gold which they brought into Egypt and spent there [ The European exploration of the Americas was fueled in no small part by reports of the gold ornaments displayed in great profusion by Native American peoples, especially in Mesoamerica , Peru , Ecuador and Colombia.
The Aztecs regarded gold as the product of the gods, calling it literally "god excrement" teocuitlatl in Nahuatl , and after Moctezuma II was killed, most of this gold was shipped to Spain.
The concept of El Dorado underwent several transformations, and eventually accounts of the previous myth were also combined with those of a legendary lost city.
El Dorado, was the term used by the Spanish Empire to describe a mythical tribal chief zipa of the Muisca native people in Colombia , who, as an initiation rite, covered himself with gold dust and submerged in Lake Guatavita.
The legends surrounding El Dorado changed over time, as it went from being a man, to a city, to a kingdom, and then finally to an empire.
Gold played a role in western culture, as a cause for desire and of corruption, as told in children's fables such as Rumpelstiltskin —where Rumpelstiltskin turns hay into gold for the peasant's daughter in return for her child when she becomes a princess—and the stealing of the hen that lays golden eggs in Jack and the Beanstalk.
The top prize at the Olympic Games and many other sports competitions is the gold medal. Although they never succeeded in this attempt, the alchemists did promote an interest in systematically finding out what can be done with substances, and this laid the foundation for today's chemistry.
The Dome of the Rock is covered with an ultra-thin golden glassier. The Sikh Golden temple, the Harmandir Sahib , is a building covered with gold.
Similarly the Wat Phra Kaew emerald Buddhist temple wat in Thailand has ornamental gold-leafed statues and roofs.
Some European king and queen's crowns were made of gold, and gold was used for the bridal crown since antiquity.
A Greek burial crown made of gold was found in a grave circa BC. Etruscan funerary wreath; 4th—3rd century BC; length: Roman aureus of Hadrian ; — AD; 7.
Byzantine scyphate ; —; diameter: 2. Pre-Columbian pendant with two bat-head worriors who carry spears; 11th—16th century; gold; overall: 7.
English Neoclassical box; ; overall: 4. French Rococo glass bottle mounted in gold; circa ; overall: 7 x 2.
The symbol Au is from the Latin : aurum , the Latin word for "gold". Outside chemistry, gold is mentioned in a variety of expressions, most often associated with intrinsic worth.
Winners of athletic events and other graded competitions are usually awarded a gold medal. Many awards such as the Nobel Prize are made from gold as well.
Aristotle in his ethics used gold symbolism when referring to what is now known as the golden mean. Similarly, gold is associated with perfect or divine principles, such as in the case of the golden ratio and the golden rule.
Gold is further associated with the wisdom of aging and fruition. The fiftieth wedding anniversary is golden. A person's most valued or most successful latter years are sometimes considered "golden years".
The height of a civilization is referred to as a golden age. In some forms of Christianity and Judaism , gold has been associated both with holiness and evil.
In the Book of Exodus , the Golden Calf is a symbol of idolatry , while in the Book of Genesis , Abraham was said to be rich in gold and silver , and Moses was instructed to cover the Mercy Seat of the Ark of the Covenant with pure gold.
In Byzantine iconography the halos of Christ , Mary and the Christian saints are often golden. In Islam ,  gold along with silk   is often cited as being forbidden for men to wear.
According to Christopher Columbus , those who had something of gold were in possession of something of great value on Earth and a substance to even help souls to paradise.
Wedding rings are typically made of gold. It is long lasting and unaffected by the passage of time and may aid in the ring symbolism of eternal vows before God and the perfection the marriage signifies.
In Orthodox Christian wedding ceremonies, the wedded couple is adorned with a golden crown though some opt for wreaths, instead during the ceremony, an amalgamation of symbolic rites.
On 24 August , Israeli archaeologists discovered a trove of early Islamic gold coins near the central city of Yavne. Analysis of the extremely rare collection of gold coins indicated that they were from the late 9th century.
Dating to around 1, years back, the gold coins were from the Abbasid Caliphate. The World Gold Council states that as of the end of , "there were , tonnes of stocks in existence above ground".
This can be represented by a cube with an edge length of about 21 meters. In , the world's largest gold producer by far was China with tonnes.
The second-largest producer, Australia , mined tonnes in the same year, followed by Russia with tonnes. In China with tonnes overtook South Africa as the world's largest gold producer, the first time since that South Africa has not been the largest.
As of [update] , China was the world's leading gold-mining country, followed in order by Australia, Russia, the United States, Canada, and Peru.
South Africa, which had dominated world gold production for most of the 20th century, had declined to sixth place.
In South America, the controversial project Pascua Lama aims at exploitation of rich fields in the high mountains of Atacama Desert , at the border between Chile and Argentina.
Today about one-quarter of the world gold output is estimated to originate from artisanal or small scale mining. The city of Johannesburg located in South Africa was founded as a result of the Witwatersrand Gold Rush which resulted in the discovery of some of the largest natural gold deposits in recorded history.
The gold is found only in six areas where archean rivers from the north and north-west formed extensive pebbly Braided river deltas before draining into the "Witwatersrand sea" where the rest of the Witwatersrand sediments were deposited.
The Second Boer War of — between the British Empire and the Afrikaner Boers was at least partly over the rights of miners and possession of the gold wealth in South Africa.
During the 19th century, gold rushes occurred whenever large gold deposits were discovered. Gold extraction is most economical in large, easily mined deposits.
Ore grades as little as 0. After initial production, gold is often subsequently refined industrially by the Wohlwill process which is based on electrolysis or by the Miller process , that is chlorination in the melt.
The Wohlwill process results in higher purity, but is more complex and is only applied in small-scale installations.
Approximately 30 percent of the global gold supply is recycled and not mined as of According to World Gold Council , China is the world's largest single consumer of gold in and toppled India for the first time with Chinese consumption increasing by 32 percent in a year, while that of India only rose by 13 percent and world consumption rose by 21 percent.
Unlike India where gold is mainly used for jewelry, China uses gold for manufacturing and retail. Gold production is associated with contribution to hazardous pollution.
Low-grade gold ore may contain less than one ppm gold metal; such ore is ground and mixed with sodium cyanide to dissolve the gold. Cyanide is a highly poisonous chemical, which can kill living creatures when exposed in minute quantities.
Many cyanide spills  from gold mines have occurred in both developed and developing countries which killed aquatic life in long stretches of affected rivers.
Environmentalists consider these events major environmental disasters. When sulfide-bearing minerals in these ore dumps are exposed to air and water, the sulfide transforms into sulfuric acid which in turn dissolves these heavy metals facilitating their passage into surface water and ground water.
This process is called acid mine drainage. These gold ore dumps are long term, highly hazardous wastes second only to nuclear waste dumps.
It was once common to use mercury to recover gold from ore, but today the use of mercury is largely limited to small-scale individual miners.
Mercury can then enter into the human food chain in the form of methylmercury. Mercury poisoning in humans causes incurable brain function damage and severe retardation.
Gold extraction is also a highly energy intensive industry, extracting ore from deep mines and grinding the large quantity of ore for further chemical extraction requires nearly 25 kWh of electricity per gram of gold produced.
Gold has been widely used throughout the world as money ,  for efficient indirect exchange versus barter , and to store wealth in hoards.
For exchange purposes, mints produce standardized gold bullion coins , bars and other units of fixed weight and purity.
Bills that mature into gold coin and gold certificates convertible into gold coin at the issuing bank added to the circulating stock of gold standard money in most 19th century industrial economies.
In preparation for World War I the warring nations moved to fractional gold standards, inflating their currencies to finance the war effort.
Post-war, the victorious countries, most notably Britain, gradually restored gold-convertibility, but international flows of gold via bills of exchange remained embargoed; international shipments were made exclusively for bilateral trades or to pay war reparations.
After World War II gold was replaced by a system of nominally convertible currencies related by fixed exchange rates following the Bretton Woods system.
Gold standards and the direct convertibility of currencies to gold have been abandoned by world governments, led in by the United States' refusal to redeem its dollars in gold.
Fiat currency now fills most monetary roles. Central banks continue to keep a portion of their liquid reserves as gold in some form, and metals exchanges such as the London Bullion Market Association still clear transactions denominated in gold, including future delivery contracts.
Today, gold mining output is declining. Inventory above ground would satisfy many decades of industrial and even artisan uses at current prices.
The gold proportion fineness of alloys is measured by karat k. Pure gold commercially termed fine gold is designated as 24 karat, abbreviated 24k.
English gold coins intended for circulation from into the s were typically a standard 22k alloy called crown gold ,  for hardness American gold coins for circulation after contain an alloy of 0.
Although the prices of some platinum group metals can be much higher, gold has long been considered the most desirable of precious metals , and its value has been used as the standard for many currencies.
Gold has been used as a symbol for purity, value, royalty, and particularly roles that combine these properties. Gold as a sign of wealth and prestige was ridiculed by Thomas More in his treatise Utopia.
On that imaginary island, gold is so abundant that it is used to make chains for slaves, tableware, and lavatory seats. When ambassadors from other countries arrive, dressed in ostentatious gold jewels and badges, the Utopians mistake them for menial servants, paying homage instead to the most modestly dressed of their party.
The special issue Canadian Gold Maple Leaf coin contains the highest purity gold of any bullion coin , at In , the United States Mint began producing the American Buffalo gold bullion coin with a purity of The Australian Gold Kangaroos were first coined in as the Australian Gold Nugget but changed the reverse design in Like other precious metals, gold is measured by troy weight and by grams.
The proportion of gold in the alloy is measured by karat k , with 24 karat 24k being pure gold, and lower karat numbers proportionally less.
The purity of a gold bar or coin can also be expressed as a decimal figure ranging from 0 to 1, known as the millesimal fineness , such as 0.
The price of gold is determined through trading in the gold and derivatives markets, but a procedure known as the Gold Fixing in London , originating in September , provides a daily benchmark price to the industry.
The afternoon fixing was introduced in to provide a price when US markets are open. Historically gold coinage was widely used as currency; when paper money was introduced, it typically was a receipt redeemable for gold coin or bullion.
In a monetary system known as the gold standard , a certain weight of gold was given the name of a unit of currency. By , it was becoming hard to maintain this price, and a pool of US and European banks agreed to manipulate the market to prevent further currency devaluation against increased gold demand.
Bullion Depository at Fort Knox. In the World Gold Council estimated total global gold supply to be 3, tonnes and demand to be 3, tonnes, giving a surplus of tonnes.
In late , gold markets experienced renewed momentum upwards due to increased demand and a weakening US dollar. Because of the softness of pure 24k gold, it is usually alloyed with base metals for use in jewelry, altering its hardness and ductility, melting point, color and other properties.
Alloys with lower karat rating , typically 22k, 18k, 14k or 10k, contain higher percentages of copper or other base metals or silver or palladium in the alloy.
The Japanese craft of Mokume-gane exploits the color contrasts between laminated colored gold alloys to produce decorative wood-grain effects.
By , the gold jewelry industry was escalating despite a dip in gold prices. Gold solder is used for joining the components of gold jewelry by high-temperature hard soldering or brazing.
If the work is to be of hallmarking quality, the gold solder alloy must match the fineness purity of the work, and alloy formulas are manufactured to color-match yellow and white gold.
Gold solder is usually made in at least three melting-point ranges referred to as Easy, Medium and Hard. By using the hard, high-melting point solder first, followed by solders with progressively lower melting points, goldsmiths can assemble complex items with several separate soldered joints.
Gold can also be made into thread and used in embroidery. Though gold is attacked by free chlorine, its good conductivity and general resistance to oxidation and corrosion in other environments including resistance to non-chlorinated acids has led to its widespread industrial use in the electronic era as a thin-layer coating on electrical connectors , thereby ensuring good connection.
For example, gold is used in the connectors of the more expensive electronics cables, such as audio, video and USB cables.
The benefit of using gold over other connector metals such as tin in these applications has been debated; gold connectors are often criticized by audio-visual experts as unnecessary for most consumers and seen as simply a marketing ploy.
However, the use of gold in other applications in electronic sliding contacts in highly humid or corrosive atmospheres, and in use for contacts with a very high failure cost certain computers , communications equipment, spacecraft , jet aircraft engines remains very common.
Besides sliding electrical contacts, gold is also used in electrical contacts because of its resistance to corrosion , electrical conductivity , ductility and lack of toxicity.
Fine gold wires are used to connect semiconductor devices to their packages through a process known as wire bonding. The concentration of free electrons in gold metal is 5.
For example, gold electrical wires were used during some of the Manhattan Project 's atomic experiments, but large high-current silver wires were used in the calutron isotope separator magnets in the project.
Metallic and gold compounds have long been used for medicinal purposes. Gold, usually as the metal, is perhaps the most anciently administered medicine apparently by shamanic practitioners  and known to Dioscorides.
Even some modern esotericists and forms of alternative medicine assign metallic gold a healing power. In the 19th century gold had a reputation as a "nervine", a therapy for nervous disorders.
Depression , epilepsy , migraine , and glandular problems such as amenorrhea and impotence were treated, and most notably alcoholism Keeley, The apparent paradox of the actual toxicology of the substance suggests the possibility of serious gaps in the understanding of the action of gold in physiology.
Some gold salts do have anti-inflammatory properties and at present two are still used as pharmaceuticals in the treatment of arthritis and other similar conditions in the US sodium aurothiomalate and auranofin.
These drugs have been explored as a means to help to reduce the pain and swelling of rheumatoid arthritis , and also historically against tuberculosis and some parasites.
Gold alloys are used in restorative dentistry , especially in tooth restorations, such as crowns and permanent bridges.
The gold alloys' slight malleability facilitates the creation of a superior molar mating surface with other teeth and produces results that are generally more satisfactory than those produced by the creation of porcelain crowns.
The use of gold crowns in more prominent teeth such as incisors is favored in some cultures and discouraged in others. 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.
Colloidal gold is used in research applications in medicine, biology and materials science. The technique of immunogold labeling exploits the ability of the gold particles to adsorb protein molecules onto their surfaces.
Colloidal gold particles coated with specific antibodies can be used as probes for the presence and position of antigens on the surfaces of cells.
Gold, or alloys of gold and palladium , are applied as conductive coating to biological specimens and other non-conducting materials such as plastics and glass to be viewed in a scanning electron microscope.
The coating, which is usually applied by sputtering with an argon plasma , has a triple role in this application. Gold's very high electrical conductivity drains electrical charge to earth, and its very high density provides stopping power for electrons in the electron beam , helping to limit the depth to which the electron beam penetrates the specimen.
This improves definition of the position and topography of the specimen surface and increases the spatial resolution of the image.
Gold also produces a high output of secondary electrons when irradiated by an electron beam, and these low-energy electrons are the most commonly used signal source used in the scanning electron microscope.
The isotope gold half-life 2. Pure metallic elemental gold is non-toxic and non-irritating when ingested  and is sometimes used as a food decoration in the form of gold leaf.
Although the gold ion is toxic, the acceptance of metallic gold as a food additive is due to its relative chemical inertness, and resistance to being corroded or transformed into soluble salts gold compounds by any known chemical process which would be encountered in the human body.
Soluble compounds gold salts such as gold chloride are toxic to the liver and kidneys. Common cyanide salts of gold such as potassium gold cyanide, used in gold electroplating , are toxic by virtue of both their cyanide and gold content.
There are rare cases of lethal gold poisoning from potassium gold cyanide. Gold metal was voted Allergen of the Year in by the American Contact Dermatitis Society; gold contact allergies affect mostly women.
A sample of the fungus Aspergillus niger was found growing from gold mining solution; and was found to contain cyano metal complexes, such as gold, silver, copper, iron and zinc.
The fungus also plays a role in the solubilization of heavy metal sulfides. From Wikipedia, the free encyclopedia. This article is about the element.
For other uses, see Gold disambiguation. For the anthology, see Element 79 anthology. Chemical element with atomic number Main article: Colored gold.
Main article: Isotopes of gold. This section needs additional citations for verification. Please help improve this article by adding citations to reliable sources.
Unsourced material may be challenged and removed. February Learn how and when to remove this template message.
Main article: List of countries by gold production. Gold is part of the Planetary Metals group. Edit this symbol.
Seven metals are associated with the seven classical planets, and seven deities, all figuring heavily in alchemical symbolism. Alchemical symbols, originally devised as part of alchemy, were used to denote some elements and some compounds until the 18th century.
We're doing our best to make sure our content is useful, accurate and safe. If by any chance you spot an inappropriate comment while navigating through our website please use this form to let us know, and we'll take care of it shortly.
Forgot your password? Retrieve it. Rate this symbol: 4. More symbols in Planetary Metals : Seven metals are associated with the seven classical planets, and seven deities, all figuring heavily in alchemical symbolism.
More symbols in Alchemical Symbols : Alchemical symbols, originally devised as part of alchemy, were used to denote some elements and some compounds until the 18th century.
Have a discussion about Gold with the community: 1 Comment. Notify me of new comments via email. Sandra Keve.
Is y a symbol for gold or silver because the other inscriptions are not visible. Like Reply Report 3 years ago.