Like other precious metals, gold is measured in troy weight and grams. When alloyed with other metals, the term carat or karat is used to show the purity of gold present, with 24 carat gold is pure and lower ratings proportionally less. Purity and gold bar or coin can also be expressed as a decimal number ranging from 0 to 1, is known as the clarity Milli, such as 0.995 are very clear.
The price of gold is determined by trading in gold and derivatives markets, but a procedure known as the setting of gold in London, originating in September 1919, offers day-to-day reference price in the industry. The afternoon fixing was introduced in 1968 at a price when U.S. markets are open.
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A Swiss-cast 1 kg gold bar. |
Historically, gold coins were widely used as currency, paper money was introduced, it typically was a receipt to exchange a gold coin or bullion. The monetary system known as the gold standard, a certain weight of gold was given the name of the unit of currency. For a long time, the United States government, the value of the U.S. dollar, so troy ounce is equal to $ 20.67 ($ 664.56/kg), but in 1934 the dollar was devalued to $ 35.00 per ounce ($ 1,125.27 / kg). In 1961, it will be difficult to maintain prices, and agreed to manipulate the market to prevent further currency devaluation against increased gold demand, which pool of U.S. and European banks.
On 17 March 1968, the economic situation has caused the collapse of the gold pool, and two price system was established, where gold is still used to settle international accounts at the old $ 35.00 per troy ounce ($ 1.13 / g) but the price of gold on the private market was allowed to move; This two-tier pricing system was abandoned in 1975 when the price of gold was left to find a market level. Central banks still hold historical gold reserves as a store of value, although the levels are generally declining. The largest gold deposits in the world, the U.S. Federal Reserve Bank of New York, which is 3% of the gold ever mined, as both laden U.S. Bullion deposit Fort Knox. In 2005, the World Gold Council estimated total global gold supply 3859 tonnes and demand to be 3,754 tonnes, which is the excess of 105 tonnes.