Gold

Gold was the element of chemistry in the periodic table that had the Au symbol (the Latin language:\aurum\) and the atomic number 79. A transitional metal (trivalent and univalent) that was soft, mengkilap, yellow, heavy,\malleable\, and\ductile\. Gold did not react with other chemicals but was attacked by chlorine, fluorine and aqua regia. This metal was often gotten in nugget gold or dust in the stone and in deposit alluvial and one of the metal coinage. The code ISO was XAU. Gold merged in the form of liquid in the temperature around 1000 levels celcius. Gold was formed from the process magmatisme or pengkonsentrasian in the surface. Some sediment was formed because of the process metasomatisme contact and the hydrothermal solution, whereas pengkonsentrasian Mechanically produce sediment despise (placer). Genesa gold is categorised to two that is: primary Sediment; dan Sediment plaser. Gold is used as the standard of finance in many countries but also is used as jewellery, and electronics. The use of gold in the monetary field and finance is based on the monetary value absolute from the gold personally against various currency all over the world, despite officially in the stock exchange of the world commodity, the price of gold is included in currency American dollar. The form of the use of gold in the monetary field usual him take the form of bulion or batangan gold in various difficult units gram until kilogram. Gold is also traded in in the form of the gold coin, like Krugerrand that is produced by South African Mint Company in various difficult units. The difficult unit krugerrand that is general is met am 1/10 oz (ounce), 1/4 oz, 1/2 oz and 1 oz. The price of the coin krugerrand is based on the movement of the price of gold in the moving market of the world commodity continue forever the trade. The Krugerrand coin especially (or normally is mentioned proof collector edition) also is produced in a limited way in accordance with the certain theme. Because of being produced limited, often the price of the coin krugerrand the edition proof this exceed the price of the content of this coin gold depend on the scarcity and the condition for this special coin. The edition that is enough to be enjoyed and looked for by the investors is The edition that contains the Nelson Mandela picture. Gotten by several countries that produce in a mass fashion the gold coin to be offered as the alternative to investment, in part: 1. Australia - kangaroo 2. China - panda 3. Malaysia - deer emas 4. Canada - maple leaf 5. England - Britannia 6. The United States - eagle and buffalo 7. South Africa - Krugerrand 8. New Zealand - kiwi 9. Singapore - lion 10. Austria - philharmonic In his history that is long and complicated, at this time gold arrives in a new era with the opportunity and the danger. The price of gold at this time is higher than the price for the last 17 years, bounce to $1000 per ounce. (1 ounce=28,3495 conceited). But, gold that remains to be mined really a little and was blackmailed from the earth at a cost of restoration of the very high and rare environment do not be in the poorest part of the world. Moreover, per March 2008, the price of gold reach US$ 1010 per Troy ounce (Troy ounce = 31,1035 gram) or am equal Rupiah 298.000 per gram. The price of gold rises during 2008 in relation to the American interest that is planned again cut off the level of his interest, but this is pointed out as a projection on the size The gold request in the market for jewellery. The similar matter also it was stressed by National Australian the Bank (NAB) in the sector of the mineral and energy. Today gold companies attack the corner of the earth is guided by the strong guide: the world Bank. The world bank, the main active agency settles poverty of the world, it was believing that companies of the multinational mine will bring investment, push the development of the road, the school and the work, to countries that do not have much capital apart from their nature resources. The world bank works in the two sides. At his urging, more than 100 governments of the country that experiences the problem of finance agree cut off the tax and royalties to attract big mine companies, says James Otto, the professor of the guest in the legal school of University of Denver. In the meantime, the world Bank gives money to or guarantee more than 30 goldmine projects, to look for the profit. Despite the mine only the insignificant part of the portfolio of the world Bank, when the accident increases by the controversy then spread. In one of the worst disasters, during 1995 a mine in Guyana that is guaranteed by the world Bank spill more than 790.000 gallon the waste of the mixed mine cyanide to the Essequibo tributary, that is the source of main water this country. During 2001, the president of the world Bank at that time, James D. Wolfenshon, determine the moratorium on mine investment for two years and order the compilation of a study about the involvement of the world Bank in This industry. The process of the amalgamation was the process of physical chemistry, if his amalgam was heated, then will hang loosely to elements that is the mercury and bullion gold. The amalgam could hang loosely with the heating in one retort, his mercury will yawn and could be regained from this condensation of mercury steam. Now Au-Ag continue to backward inside retort as metal. The use of Zn dust was one of the methods that was effective for the solution that contained the concentration of small gold. Zn dust that was added in the solution will bend gold metal and silver. The principle of this sedimentation based the Clenel row, that was compiled was based on the difference of the place of the activity elektro chemistry from metals in the solution cyanide, that is Mg, Al, Zn, Cu, Au, Ag, Hg, Pb, Fe, Pt. each kind of metal that was on the side left from the association of his cyanide of the complex could bend metal that was replaced by him. So in fact not only Zn that could urge Au and Ag, but Cu and Al could be also used, but because of his price more Expensive then better used Zn.