After gold is one of the metals and important elements that exist in nature in limited quantities relative to the rest of the elements such as iron, for example, and hence gained gold value and importance among people, a chemical element symbolized by the symbol and atomic number 79 in the periodic table, It is the most dense element, and because of all the previous qualities, gold was used as a currency in the old countries until the paper currency of the modern era was published in specialized printing presses. However, with the emergence of this type of currency, gold is still Which gives to The value of the currency is derived from the monetary base represented by gold and used by the International Monetary Fund and the Bank for International Settlements. In addition to its financial uses, gold is used in the manufacture of jewelry and jewelry that adorn the body of the woman and give them beauty and polish on top of it, in addition to the use of jewelry and jewelry that also belong to men.
Gold is found in the bottoms of rivers or underground, and is often associated with other elements, including lead and copper. Gold is purified of dirt, dust and dirt when it is extracted from the ground, from a very strong current that cleans and purifies it so gold remains Crude, while mercury is also used to dissolve gold, and gold is removed from mercury by distillation. In addition, gold may be extracted without intention when metals and other elements such as silver are extracted.
The original gold can be distinguished from other metals by several tests, including mass. Two different blocks can be measured from the pieces to be examined, but they are required to be of the same size. But the block mass can be manipulated until it looks like the real mass. The second method used is stamping or stamping, where the piece of gold is stamped in the name of the manufacturer and the caliber and the magnifier can be used for that. The piece of gold can also be bitten, if the teeth have an impact on the gold piece, they are original, but the disadvantage of this piece is that it leaves an impact that can not be removed on the gold piece, which spoils its appearance. As vinegar can be used, gold does not react with oxygen or with acid because it has a high density, if the reaction and interaction of the piece they are imitated. Finally, the examiner can use the magnet if the piece is attracted to it, it is not the original gold. Most of the previous methods can be manipulated, so be aware.