Gold is mainly used by the jewelry industry, but a significant portion is also utilized as an investment in the form of coins and gold bars. Gold is an important economic asset in the global market. Approximately one-third of the world’s total gold reserves are held by the central banks of various countries. Gold has remarkable properties such as high durability, good conductivity, high temperature resistance and resistance to corrosion. As a result, gold is very much in demand within the electronics, aerospace and pharmaceutical industries. Phones and computers are two good examples of products where gold is an important metal.