Article about gold
Nthali always been do not know .. What is gold?
Gold Rare Earth and is one of the most expensive metals in the world ,, is extracted from the mines and the mountains and monuments, but the extraction cost a lot of money, they are extracting a large boulder the size of the room and Estkhrj of which only a few grams of pure gold.
Most of the gold that has been discovered since 6000 is still in the possession of rights.
Had been assembled this gold and melted cubic may constitute a rib 59 feet and weighing 103,000 metric tons, and gold is more metals softer and voluntarily and can be withdrawn per ounce in the form of wire length of 5 miles or roads in the form of an extremely thin plate even covers an area of 100 square feet.
The gold is the world's most elements of the density, it is denser than iron two and a half times and shot twice. The square feet of gold weighs about 1200 lbs.
Before almost two years many of the mines closed due to the deterioration of gold prices in global markets have become practical extracted and purified financial returns do not come, but it has become a loss to their owners because Altkvlh higher than the selling price.
As the extraction of one ton in the mines can be obtained through the one ounce of gold.
Gold Ocefrohnak white gold, yellow gold color is prevalent all over the world and is known for its gold color, everyone knows that the yolk is the color of gold.
Pure gold, or the so-called gold bullion, be free of impurities and be of caliber 24 carats, but can not use the alloys in the same caliber of 24 carats in the manufacture of gold jewelery because it will be tender and soft, this is credited to him copper or silver, and at least indentifier and focus and become a 22 carat or 21 carat after the addition of copper or silver scales and weights are known they equation knows who the manufacture of these ornaments, or are added and more copper or silver, and at least focus becomes indentifier 18 carat .. if we add more copper or silver is also less focus and it becomes 14 or 9mm caliber .
Gold in the Arab region is among us rolling from a 21-gauge or 18, but in some countries such as India and Turkey carat gold known to have the kind of 22-carat .... either 14 carat and 9 Fmarovh in Western countries such as Britain and America, which is the official caliber have gold.
It is characteristic of this metal he retractable roads ,, which we can shape, the way we want without any difficulties or techniques .. It is also characteristics that he gets rid of the impurities attached to him once he is goodwill Vinfsal gold case and impurities unchecked ..
More than 19 tons of gold are manufactured each year in wedding rings, as the jewelry industry is the most widely used of gold to date.
It uses a goldsmith in the detection of the purity of a sample of 24 gold golden needle up to the purity of the first 1/24 of the latter are chosen sample by a strep test for gold and then compared with scratching caused scratches caused by needles. Although the use of Mahkat and needles for the detection of the purity of gold is no longer fashionable to be purity system remains. Thus the gold of 24 carat is pure gold, 100% and 18 carat gold is a part of 18 gold and 6 parts of other metals .. and so on.
The mine (Hom Steak) Walid in South Dakota's oldest gold mine in the world, gold was discovered there over the past 115 years.
And retains the Federal Reserve Bank in New York City of gold worth about $ 144 billion in safe underground area of half a football pitch.
· An estimated $ 8 billion tons have melted in the oceans of the world, and that there are 35 thousand metric tons still exist in the earth's crust.
· Largest bloc is gone undiscovered (Wellcome Stranger) and discovered in Australia in 1896 and which weighs 2.280 oz.
