Gold is produced at some mines as part of the process of mining and refining other metals, such as copper. At those operations, gold is refined to an acceptable purity as part of the copper production process. At most gold mines, the gold "dore" is sent to a refinery for further processing
The most common means of recovering gold is the Cyanidation process.
Cyanidation involves the leaching of ore in a strictly controlled alkaline cyanide leach
solution, after which the gold is then re-dissolved and subsequently smelted into doré bars that are shipped to the refineries.
The doré bars are further refined to become as close to pure gold as possible, in the form of gold
bullion bars. They are then given 'good delivery status', the international standard for quality,
providing assurance that they contain the quantity and purity of gold that has been stamped on them