Gold is a chemical element which symbol is "Au" and which atomic number is 79. Its name comes from the Latin word "aurum". It is a transition metal of yellow shining color, very ductile and malleable; gold is found as nuggets or as river alluvia in its original form.
The industry of gold is divided into four main categories:
1. The jewellery consumes approximately a third of the production.
2. Tanks buy gold in compensation of the emissions of currency, which is approximately a third of the world production.
3. Private individuals buy a quarter of the world production in coins and bars.
4. As for the rest, about 10% is used in the industry, particularly in gilding.
Gold is traded on the noble metals market, mainly in New York, London, Zurich and Hong Kong. It is listed in ounce (1 ounce = 31,1035 grams) and in $US. A standard bar weighs around 400 ounces (about 12,5kg).