Gold is also distinguished by its malleability. For example 10 grams of gold can be transformed into a delicate translucent laminate of 3.5 m2 or as a fine spider-web like thread of nearly 25 km in length.
The chemical symbol of gold is " AU " of Platus Aurum. Its
specific weight is of 19,3.The measurement of weight used in relation to gold is the ounce tray (one ounce tray is equivalent to 31,1035 grams).
In its natural state solid gold can be found in rocky deposits, or in the bed of rivers between the sand and the gravel in the form of sand or nuggets.
This is the type of gold that the California "prospectors" tried to find in the rivers with their primitive sieves. At the moment gold is extracted with more modern mining techniques. In order to obtain 10 grams of gold, tons of rock to a depth of 3,000 meters must be extracted.
Crushing it and adding water obtains a fine mud solution of which the gross of the gold is extracted, by a chemical process (cyanide solution).
Before the gold arrives at a degree of purity of 99.99 %, it is necessary that it undergoes the electrochemical process of melting.
This process endures a considerable cost, and it is for this reason that the amount of gold currently extracted is so small, (90,000 tons, approximately) would fit in to o a bucket of 18 meters long.