How is gold refined?

Gold is a natural product that cannot be synthesized artificially, and it is divided into raw gold and cooked gold.

The raw gold is called natural gold, is the object of the cooked gold, is mined from the mine or the river bottom alluvial layer, did not go through the smelting and refining of gold.

Cooked gold is raw gold after smelting, purification of gold, generally higher purity, finer density, some can be directly used in industrial production. Commonly, there are gold bars, blocks, ingots and a variety of different jewelry, utensils, gold coins, as well as industrial use of gold wire, sheet, plate and so on.

Gold after purification to achieve a fairly high purity of gold is called pure gold, generally refers to the gold to achieve more than 99.6% color.