Gold is a chemical element that has the symbol Au and atomic number 79. A transition metal (trivalen and univalen) of soft, shiny, yellow, heavy, malleable, "and" ductile ". Gold does not react with other chemical substances, but fell ill by chlorine, fluorin and aqua regia. There are a lot of this metal in the nugget of gold in rocks or pollen, and in the alluvial deposit and one of the coinage metals. ISOnya code is XAU. Gold in the form of a liquid melt at a temperature of about 1000 degrees centigrade. Gold is a metal that is soft and easy to be incused, violence ranged from 2.5 to 3 (Mohs scale), and a heavy type depending on the type of metal matrix and coalesce with the others. Minerals of gold are usually joined with the following minerals (gangue minerals). Mineral follow-up generally quartz, carbonic, turmalin, flourpar, and a small number of non-metallic minerals. Mineral carrier also joined the gold sulfide deposition. Minerals of gold consists of gold nativ, elektrum, gold telurida, blend and compound a number of gold with the elements sulfur, antimon, and selenium. Elektrum actually other types of nativ gold, silver womb only in> 20%. Golden form of the magmatism in the surface or slab. Some of the deposition process because the form and contact metasomatism solution hidrotermal, whereas in the mechanical deposition letakan (placer). Genesa gold into two groups namely: Primary sediment and sediment plaser. Used as the gold standard in many countries financial and also used as jewelry, and electronics. The use of gold in the monetary and financial field based on absolute monetary value of gold itself against many currencies around the world, although officially the world's commodity exchanges, the price of gold is included in the United States dollar currency. The form of the use of gold in the monetary field is often the form of bouillon or batangan gold in a variety of gram to kilogram weight. In addition to these various types of gold sold.
