Select a desired item and drag it into the shooping cart at the right corner.Delete items by clicking on button delete all or decrease item state of quantity by clicking on item individually...
Admirable piece of jewelry from category of silver earrings and name of Amber Cube Sterling Silver Millennium Collection Contemporary Perfect Stud Earrings. This jewelry has perfect style and the cost is (45.0, 'USD') which is proportional to the quality of article.
With this choice you have proven that you know what is quality.. Be proud owners of this beauty and show it to everyone. Jewelry brand responsible for the creation of this item is Ian & Valeri Co.. Premium material from which it is created is 925 Sterling Sterling silver Amber . Characteristics of it are: Amber is the fossilized resin from ancient forests.. Good price for you, do not miss it ! Click on button Click To Order and buy this article..
Article Amber Cube Sterling Silver Millennium Collection Contemporary Perfect Stud Earrings has a rating of 4.5 based on 9 customer marks
Silver is a chemical element with the symbol Ag and atomic number 47. The soft, white, lustrous transition metal, it has the highest electrical conductivity, thermal conductivity and reflectivity of metals. Metal occurs naturally in its pure, free form (native silver), as an alloy of gold and other metals and minerals such as argentite and chlorargyrite. Most silver produced as a by-product of copper, gold, lead, and zinc refining. Silver has long been valued as a precious metal. More abundant than gold, silver metal has many pre-modern monetary systems functioned as coin able specie, sometimes together with gold. In addition, silver has many applications in excess of currency, such as solar panels, water filtration, jewelry and ornaments, high-value tableware and utensils (hence the term silverware), and also as an investment in the form of coins and bullion. Silver is used in industrial electrical contacts and conductors, in specialized mirrors, window film and in catalysis of chemical reactions. Its compounds are used in photographic film and x-rays. Dilute the silver nitrate solutions and other silver compounds are used as disinfectants and microbicides, added bandages and wound dressings, catheters and other medical instruments. CharacteristicsEditSilver is produced in certain types of supernova explosions after the nucleosynthesis of lighter elements through the r-process, a form of nuclear fusion that produces a lot of elements heavier than iron, of which silver. Silver is a very ductile, malleable (slightly less than gold) univalent metal coins with a brilliant white metal metallic luster that can take a high degree of polish. Protected silver has a higher optical reluctance than aluminum at all wavelengths longer than 450 nm. At wavelengths shorter than 450 nm reluctance Silver is worse than aluminum and falls to zero near 310 nm. The electrical conductivity of silver is the highest of all the metals, even higher than copper, but the greater the cost to be prevented, it is often used in place of copper for electrical purposes. The exception is in radio-frequency engineering, especially on VHF and higher frequencies, where the silver employed to improve the electrical conductivity of the components, including wires. Silver also has the lowest contact resistance of metals. During World War II in the US, 13,540 tonnes are used in the electromagnets used for enriching uranium, mainly due to the war of copper deficiency. Pure silver has the highest thermal conductivity metal, although the nonmetal atoms in the form of diamond and super fluid helium II are higher. Silver halides are photosensitive and are remarkable for their ability to record a latent image that can later be developed chemically. Silver is stable in pure air and water, but darkens when exposed to air or water, which contains ozone or hydrogen sulphide, that forms a black layer of silver sulfide, which can be cleaned with dilute hydrochloric acid. The most common oxidation state of silver is 1 (for example, silver nitrate, AgNO3); less common two compounds (for example, silver (II) fluoride, AgF2), and even less frequently 3 and even four compounds (for example, potassium hexafluoroargentate. They are also known. Isotopes occurring silver is composed of two stable isotopes, 107Ag and 109Ag with 107Ag slightly more abundant. Their almost equal abundance is rare in the periodic table. Silver is the atomic weight is 107.8682 (2) g / mol. Twenty-eight radioisotopes have been characterized, the most stable but 105Ag half-life of 41.29 days, 111Ag half-life of 7.45 days, and 112Ag half-life of 3.13 hours. This element has numerous meta states, the most stable being 108mAg (t1 / 2 418 years) 110mAg (t1 / 2 249.79 days) and 106mAg (t1 / 2 8.28 days). All the remaining radioactive isotopes have a half-life of less than one hour, and most of them has a half-life of less than three minutes. Isotopes of silver in the area of relative atomic weight of 93.943 (94Ag) to 126.936 (127Ag); primary decay mode before the most abundant stable isotope, 107Ag, is electron capture and the primary mode after is beta decay. The primary decay products before 107Ag are palladium (element 46) isotopes and the primary products after are cadmium (element 48) isotopes. Palladium 107Pd isotope decays by beta emission to 107Ag half-life of 6.5 million years. Iron meteorites are the only objects with a high enough ratio of palladium-on-silver to give a measurable difference in 107Ag abundance. Radiogenic 107Ag was first discovered in the Santa Clara meteorite in 1978. The discoverers suggest coalescence and differentiation of iron-cored small planets may have occurred 10 million years after nucleosynthetic event. 107Pd-107Ag correlations observed in bodies, which have been melted out of the accretion of the solar system must reflect the presence of volatile radionuclides in the early solar system. Silver metal dissolves readily in citric acid (HNO3) to give a silver nitrate (Agno3) of a transparent crystalline solid, which is light and easily soluble in water. Silver nitrate is used as a starting point for the synthesis of many other silver compounds, as an antiseptic, and, as a yellow colored glass stained. Silver metal does not react with the sulfuric acid, which is used in jewelry for the cleaning and removal of copper oxide fire scale silver products by silver soldering or annealing. Silver quickly reacts with sulfur or hydrogen sulfide H2S to produce silver sulfide, a dark-colored compound, known as a tarnish on the silver coins and other items. Silver sulfide Ag2S forming a silver coat, when silver is the electrical contacts used in an atmosphere rich in hydrogen sulphide.4 Ag + O2 + 2 H 2 2 Ag2S + 2 H2OSilver chloride (AgCl) is precipitated from a solution of silver nitrate in the presence of chloride ions and the other silver halides used in the manufacture of photographic emulsions are made in the same way, with the use of bromide or iodide salts. Silver chloride is used in the glass electrodes for pH testing and potentiometric measurement and transparent cement glass. Silver iodide has been used in attempts to seed clouds to produce rain. Silver halides are highly insoluble in aqueous solution and used in the gravimetric analysis methods. Silver oxide (Ag2O), formed from the silver nitrate solution is treated with a base, which is used as a positive electrode (anode) in a watch battery. Silver carbonate (Ag2CO3) is precipitated when silver nitrate is treated with sodium carbonate (Na2CO3).2 AgNO3 + 2 OH- Ag2O + H2O + 2 NO3-2 AgNO3 + Na2CO3 Ag2CO3 + 2 NANO3Mercury fulminate (AgONC), strong, touch the explosive used in the percussion caps is made by reacting metal metallic silver with citric acid in the presence of ethanol (C2H5OH). Other dangerously explosive silver compounds are silver azide (AGN3), formed by reaction of silver nitrate with sodium azide (NaN3), and silver acetylene, arises when the silver is reacted with an acetylene gas. The latent image formed in the silver halite crystals developed by the treatment with alkaline solutions of reducing agents such as hydroquinone, metal, or acerbic acid, reducing the exposed silver halite to the metal. Can reduce the alkaline solution of silver nitrate silver metal by reducing sugars such as glucose, and this reaction is used for the silver glass mirrors and the interior of the glass Christmas ornaments. Silver halides are soluble in solutions of sodium thiosulfate (Na2S2O3), which is used as a photographic fixer, to remove excess silver halite photographic emulsions according to the development of images. Silver metal was attacked with strong oxidizing agents such as potassium permanganate (KMnO4) and potassium dichromate (K2Cr2O7), and in the presence of potassium bromide; These compounds are used in photography bleach silver images are converted to silver halides, which can either be fixed with thiosulfate or renovation to strengthen the original image. Silver cyanide complexes formed, which are soluble in water in the presence of excess cyanide ions. Silver cyanide solutions are used in electroplating silver. Although the silver is usually in the +1 oxidation state of the compounds, in other oxidation states is known, such as 3 to AGF3, produced by the reaction of elemental silver or silver fluoride with krypton fluoride. Silver artifacts primarily undergo three forms of deterioration. Silver sulphide tarnish silver is the most common form of degradation. Fresh silver chloride pale yellow color becomes purple in the sunlight and projects slightly from the surface of the artifact or coin. Precipitation of copper in the old silver can be used to date artifacts. ApplicationsEditMany well-known use of silver include its precious metal properties, including currency, decorative items and mirrors. The contrast between its bright white color and in other media it is very useful for visual arts. In contrast, fine silver particles form a thick black in photos and silverpoint drawings. It has also long been used to obtain a high monetary value of such objects (such as silver coins and investment bars), or objects symbolic of high social or political rank. Silver salts have been used since the Middle Ages to produce yellow or orange stained glass, and more complex decorative color reaction may be produced by incorporating a silver metal blown, kiln formed or torch worked glass. CurrencyEditSilver, in the form of ELECTRUM, is coined to produce money around 700 BC, which Lydians. Later, silver was refined and coined in its pure form. Many nations used silver as the basic unit of monetary value. In the modern world, silver bullion has the ISO currency code XAG. Name of the pound sterling (GBP) reflects the fact that originally represented the value of one pound Tower weight of sterling silver; other historic currencies, such as the French Livre have similar etymologies. In the 19th century it was bimetallism, which prevailed in most of the countries threatened by the discovery of large deposits of mercury in the Americas; fearing a sharp fall in the value of silver and the currency most countries switched to the gold standard by 1900. In some languages such as Sanskrit, Spanish, French, and Hebrew, the same word means both silver and money. 20th century gradual shift to fiat currencies, with the majority of the world's monetary system is losing its link with precious metals, when Richard Nixon was the US dollar off the gold standard in 1971; The last currency backed by gold, the Swiss franc, which has become a pure fiat currency on 1 May 2000. In this same period, silver gradually ceased to apply in circulation coins. In 1964, the United States stopped minting their silver dime and a quarter. They are minted its last orbits silver in 1970 in its 40% of a half dollar. In 1968, Canada minted its last circulated silver coins, which were 50% and 50% of the dime quarter. Royal Canadian Mint still makes a great collectible silver coins with various dollar denominations. In addition to Canada, the USA and many other countries continue minting silver coins, which are collected for their bullion and collectible value. Coin United States is known as the “Silver Eagle”. Silver is used as a currency for many individuals, and the legal tender in the US state of Utah. Silver and precious metals are also used as an investment to protect against inflation and devaluation. Jewelry and silverware are traditionally made from sterling silver alloy of 92.5% silver with 7.5% copper. In the US, only an alloy consisting of at least 90.0% fine silver is marketed as “silver”. Sterling silver is harder than pure silver, and has a lower melting point (893 C) than either pure silver or pure copper. Britannia silver is an alternative to the standard, the quality label, which contains 95.8% silver, which is often used to make silver tableware and wrought plate. With the addition of germanium which is patented modified alloy Argentium sterling silver formed with improved properties, including resistance to fire scale. Sterling silver jewelry is often covered with a thin layer of 0.999 fine silver to the item a shiny finish. This process is called “flashing”. Silver jewelry can be plated with rhodium or gold (for the production of silver gilded). Silver is an integral part of almost all colored carat gold alloys and carat gold solders, giving the alloys paler color and greater hardness. White 9 carat gold containing 62.5% silver and 37.5% gold, while the 22 carat gold containing at least 91.7% gold and 8.3% of silver or copper or other metals. Historically, the organization of training and Silversmiths Guild of gold goldsmiths included as well, and the two crafts remain largely overlapping. Unlike forgers, silversmiths not formed of metal, while the red-hot, but instead of operating at room temperature with gentle and carefully placed hammer blows. The essence of silversmithing is that a flat piece of metal and turn it into a useful object using different hammers, stakes and other simple tools. While silversmiths specialized and particularly work silver, but also work with other metals, such as gold, copper, steel and brass. Bodo jewelry, silverware, armor, vases and other art objects. Because silver is so malleable metal, silversmiths have a large range of choices in how they prefer to work metal. Historically, silversmiths are mostly referred to as gold goldsmiths, which was usually the same guild. In western Canadian silversmith tradition, guilds do not exist; However, mentoring through colleagues becomes a method of professional education in the community artisans. Traditionally, mainly from the silversmiths 'silverware'. Only in recent times has silversmithing become mainly work in jewelry, the less solid silver cutlery is now manually. Solar is used in the manufacture of crystalline solar photo voltaic panels. Silver is also used in plasmonic solar cells. 100 million ounces of silver prospects for the use of solar energy in 2015. Silver reflective coating choice for concentrated solar power spotlights. In 2009, scientists at the National Renewable Energy Laboratory and SkyFuel team for the development of large curved plates, which have the potential to be 30% cheaper than today's best collectors of concentrated solar energy by replacing glass-based designs with silver polymer sheet that has the same effect as heavy glass mirrors, but at a much lower cost and weight. It is also much easier to set up and install. Smooth film that uses multiple layers of polymer, with an inner layer of pure silver. In 2014, researchers invented a mirror-like plate, which, when installed on a building, act as air-conditioning. The mirror is constructed of multiple layers of thin materials. The first layer of silver is the most reflective material on Earth. On top of this are alternating layers of silicon dioxide and hafnium oxide. These layers improve reflectivity, but also to turn the mirror in the heat radiator. Water is used in water treatment plants. This prevents bacteria and algae from building up filters. Catalytic action of silver, in agreement with oxygen, sanitizes water and eliminates the need for chlorine. Silver ions are added to the waste water treatment systems in hospitals, community water systems, swimming pools and spas, displacing chlorine. DentistryEditSilver may be alloyed with the mercury at ambient temperature to amalgams, which are often used for dental fillings. To the dental amalgam is a mixture of silver powder and other metals such as tin and gold mixed with mercury to stiff paste, which can be adapted to the form of the cavity. Dental amalgam reaches an initial hardness within a few minutes, and sets hard in a few hours. Photography use of silver in photography, in the form of silver nitrate and silver halides, has rapidly decreased due to lower consumer demand for color film from the advent of digital technology. From the top of the global demand for photographic silver in 1999, the market contracted in 2013 almost 70%. Some electrical and electronic products used silver for its superior conductivity, even when tarnished. The primary example of this is high-quality RF connectors. The increase in conductivity should also be exploited in RF engineering at VHF and higher frequencies, where the guides often can not be scaled by 6%, due to the tuning requirements, such as cavity filters. As a further example, printed circuit boards and RFID antennas can be made using silver paints, and computer keyboards use silver electricalcontact. Silver cadmium oxide is used in high-voltage contacts because they can withstand sparks. Some manufacturers produce audio connection cables, speaker cables and power cables using silver wires which have a 6% greater conductivity than ordinary copper than those of identical dimensions, but it costs a lot more. Although it is doubtful many Hindi enthusiasts consider silver wire improves the sound quality. Small devices such as hearing aids, watches and clocks, often used silver oxide batteries due to their long life and high energy ratio and weight. Another use is a high performance silver-zinc and silver-cadmium batteries. The Second World War was the lack of copper and silver borrowed from the United States Treasury for electrical windings of more generating plants, including those of the Manhattan Project; see below History, WWII. Glass coatingsEditTelescopic mirrorsMirrors in almost all reflecting telescopes using vacuum aluminum coating. However, thermal or infrared telescopes use of silver-coated mirrors for Silver skills to be more effective than aluminum reflects some kind of infrared radiation, as well as the ability of Silver to reduce the amount of radiation actually emitted mirror. Silver, in protected or improved coatings, which is seen as the next generation of metal metallic coating on the reflective telescope mirrors. WindowsUsing a process called sputtering, silver, together with other optically transparent layer, which is used for the glass which creates low emissivity coatings that are used in high-performance insulated glazing. The amount of silver used on the window is small, because the silver layer is only 10-15 nanometers. However, the amount of silver coated glass world there are hundreds of millions of square meters per year, resulting in consumption of silver on the order of 10 cubic meters or 100 tons / year. Silver color seen in the architectural glass and tinted glass in vehicles produced by sputtered chrome, stainless steel or other alloys. Silver-coated polyester sheets, which are used for the reconstruction windows are another popular method for reducing the transmission of light. Silver and silver alloys are used in the construction of high-quality wind musical instruments of many types. Pipes, in particular, are usually made of silver alloy or silver-plated, both for appearance and for the friction properties of the surface of silver. Brass instruments such as trumpet and baritone are also frequently plated in silver. Catalytic properties of Silver is that it is ideal for use as a catalyst in oxidation reactions, for example, the production of formaldehyde from methanol and air by using the silver screens or crystallizes, which contain a minimum 99.95 percent by weight of silver. Silver (on a suitable support) is probably the only catalyst, it is now available for the conversion of ethylene is ethylene oxide (later hydrolyzed ethylene glycol, which is used for the manufacture of polyesters) - an important industrial reaction. It is also used in a test for the detection of reduced sulfur compounds, and carbonyl sulfides. Since silver is easily absorbed by the free neutrons, it is widely used for the manufacture of control rods to regulate the fission chain reaction in a pressurized water nuclear reactor, usually in the form of an alloy containing 80% silver, 15% indium and 5% cadmium. Silver used for making soldering and brazing alloy, and a thin layer on the bearing surfaces can provide a significant increase in the etching resistance and the reduction of wear under load, especially to steel. BiologyEditSilver stains are used in biology to increase the contrast and visibility of cells and organelles in microscopy. Silver stain used to study cells of the nervous system and the Golgi apparatus. Silver staining is used to stain proteins in gel electrophoresis and polyacrylamide gels, either as a primary or stains to enhance the visibility and contrast of colloidal gold stain. Different yeasts from Brazilian gold mines, bio accumulative free and complexed silver ions. A sample of the fungus Aspergillus Niger was grown from a solution of gold ores; and it was found to contain a cyano metal complex; such as gold, silver, copper, iron and zinc. The fungus also plays a role in the solubilization of heavy metal sulphides. MedicineEditThe Colloidal silver include its integration into the wound, and its use as a coating on antibiotics in medical devices. Wound dressings incorporating silver sulfadiazine or silver nano can be used for the treatment of external infections. Silver is also used in some medical applications, such as urinary catheters and endotracheal tubes of the respiratory, wherein the conditionally evidence that it is effective in the reduction of urinary tract infections associated with catheters and pneumonia respectively. Silver ion (Ag +) is bio active and in sufficient concentration immediately destroy bacteria and Vito. Silver and silver nanoparticles are used as an antimicrobial in various industry, health and home use. InvestingEditSilver and precious metals are used for investment. Different types of silver investments can be made in the equity markets, including acquisition or silver streaming stock or exchange-traded fund backed silver. ClothingEditSilver inhibits the growth of bacteria and fungi on clothing, such as socks, so is sometimes added to reduce odor and risk of bacterial and fungal infections. This is incorporated into the clothing or shoes, or by the inclusion of silver nanoparticles in the polymer, from which are made of yarn or coating yarns with silver. Loss of silver in the wash varies between textile technologies and the consequent impact on the environment is not yet known. HistoryEditSilver has been used for thousands of years for ornaments and utensils, trade, and as a basis for many monetary systems. Its value as a precious metal has long been considered the only gold. The word “silver” appears in the Anglo-Saxon in various formats such as seolfor and siolfor. A similar form looks Germanic languages. The chemical symbol Ag derived from the Latin word for “silver” Argent (Compare the Greek, rgyros) from the Indo-European root * Arg, which means “white” or “holy”. Silver has been known since ancient times; mentioned in the book Geneze. Found in Asia Minor and the islands in the Aegean Sea slag heaps suggests silver was separated from lead as early as the 4th millennium BC through the use of surface mining. One of the first silver extraction centers in Europe, the Sardinia in the early copper. The stability of the Roman currency relies on a high level in the supply of silver bullion that Roman miners produced at a scale unmatched before the discovery of the New World. Achieving maximum production of 200 tonnes per year, the estimated stock of 10,000 t silver circulated in the Roman economy in the middle of the second century AD, five to ten times greater than the total amount of silver in medieval Europe and the Caliphate available around 800 AD. Financial officials of the Roman Empire worried about the loss of silver to pay for highly demanded silk from Silica (China). Mines were made in Laureion between 483 BC. In the Gospels, Jesus' disciple Judas Iscariot is infamous because it accepted a bribe of 30 silver coins from the religious leaders in Jerusalem that Jesus of Nazareth over the soldiers of the high priest Caiaphas. The Chinese Empire during most of its history mainly used silver as a medium of exchange. In the 19th century, a threat to the balance of payments of the United Kingdom from Chinese traders, requiring payment in silver in exchange for tea, silk and porcelain led to the Opium War, as Britain had to find a way to deal with imbalances in payment and have decided to They do so by selling opium produced in the colony of British India to China. Islam allows Muslim men to wear silver rings on the little finger of one hand. Muhammad himself wore a silver signet ring. In America was high temperature silver-lead appellation technology developed precinct civilizations have AD 60-120. In World War II, copper deficiency led to the replacement of mercury in many industrial applications. United States Government lent silver from its extensive reserves, located in the archives of West Point for a wide range of industrial users. One very important use of the bus bars for new aluminum plants that are needed to make the plane. During the war, many electrical outlets and switches are silver-plated. Another use is the master plane rod bearings and other types of bearings. Since silver can be replaced tin in the solder at a lower volume, the large amount of tin freed up for other purposes, with the replacement of governments silver. Silver has been used as a reflector of the reflectors, and other types of light. Silver has been used in the war nickels to save these metals for use in steel alloys. Manhattan Project to develop the atomic bomb, which uses about 14,700 tons of silver borrowed from the United States Treasury for calutron windings for electromagnetic separation process in the Y-12 National Security Complex in Oak Ridge national laboratory. Oval “racetrack” had a silver bus bars with a cross section of one square meter. When the war ended, silver was back in the archive. Silver is found in the native form, as an alloy of gold and ores containing sulfur, arsenic, antimony, or chlorine. Rude include argentite (Ag2S) chlorargyrite (AgCl), which includes horn and silver pyrargyrite (Ag3SbS3). The main sources of silver ores, copper, copper-nickel, lead, and lead and zinc obtained from Peru, Bolivia, Mexico, China, Australia, Chile, Poland and Serbia. Peru, Bolivia and Mexico have been mining silver since 1546 and are still major world producers. Top producing silver mines in the Pennington (Australia), Fresnillo (Mexico), San Cristobal (Bolivia), Antamina (Peru), Rudna (Poland) and Penasquito (Mexico). Top short-term mine development projects by the end of 2015, the Pascua Lama (Chile), Naiad (Argentina), Jaunicipio (Mexico), at least khot (Bolivia), and Hackett River (Canada). In Central Asia, Tajikistan is known to have some of the largest silver deposits in the world. The metal is mainly produced as a by-product of the electrolytic refining of copper, gold, nickel and zinc refining, and using the procedure of lead metal obtained from lead ores containing small amounts of silver. Commercial grade fine silver is at least 99.9% pure and purity greater than 99.999% are available. In 2011, Mexico was the top producer of silver, followed closely by Peru (4,000 tons) and China (4,000 t). PriceEditAs of 5 August 2014 the price of silver is US 649.28 per kilogram (US 20.1950 per ounce). This means that about 1/64 the price of gold. The ratio varied from 1/15 to 1/100 in the last 100 years. Physical silver bullion prices were higher than the prices of paper, with premiums rising when demand is high and there is a local shortage. In 1980, the price of silver has risen to the top in modern times the US 49 .45 per ounce for market manipulation Nelson Bunker Hunt and Herbert Hunt. Inflation-adjusted 2012 to approximately US 138 per ounce. Some time after the Silver Thursday, the price was back to 10 / Ozt. From 20011 to 2010 the price has moved from 4.37 to 20.19. According to the Silver Institute, the recent gains Silver is a result of rising investor interest and increasing demand fabrication. At the end of April 2011, silver reached a record of 49.76 / Ozt. In earlier times, silver has commanded much higher prices. In the early 15th century, the estimated price of silver to have exceeded 1,200 per ounce, based on 2011 dollars. The discovery of massive deposits of silver in the New World in the following centuries it was stated as the reason for its price sharply declined. The price of silver is important Judaic law. The minimum tax amount Jewish court, or Beth Din, may be convened to decide the matter, shovel Prut (Prut Babylon value of the coin). This is established in the amount of 0.025 grams (0.00088 oz) of pure, unrefined silver at the market price. In Jewish tradition still continues on the first birthday of the first born son of parents pay the price of five pure-silver with co chenille (priest). Today, Israel mint sets coins at 117 grams (4.1 oz) of silver. Co chenille will often give those silver coins back as a gift for a child to inherit. Silver plays no known natural biological role in humans and possible health effects of silver are the subject of controversy. Silver itself is not toxic to humans, but most silver salt. In high doses, mercury and compounds containing it, it can be absorbed into the bloodstream and become deposited in various body tissues, causing argyria, which is reflected in the blue Siva pigmentation of the skin, eyes and mucous membranes. Argyria is rare, and even as far as is known, this condition does not otherwise harm the health of a person is disfiguring and usually permanent. Mild forms of argyria are sometimes mistaken for hypnosis. Excessive exposure to mercury may occur in workers in the metallurgical industry, people taking dietary supplements containing silver, patients who have received treatment silver sulfadiazine, and individuals who are accidentally or intentionally ingested silver salts. Silver concentrations in whole blood, plasma, serum, or urine can be measured to monitor the safety of workers exposed to confirm the diagnosis in potential poisoning victims or to assist in a forensic investigation in the case of fatal overdose. Silver is used in food coloring; the E174 indication and is approved in the European Union. Traditional Indian dishes sometimes involving the use of decorative silver foil known as VARK, and in different cultures, silver DRAGEE used to decorate cakes, cookies and other dessert items. The use of silver as a food additive is not approved in the United States.