Gold in nature is a natural product that exists in a free state and cannot be synthesized. According to its source of different and refining the content of different into raw gold and cooked gold and so on.Gold in nature is a natural product that exists in a free state and cannot be synthesized. According to its source of different and refining the content of different into raw gold and cooked gold and so on. Raw gold is also known as natural gold, barren gold, raw gold, is the object of cooked gold, from the mine or river bottom alluvium mining without melting refining of gold. Raw gold is divided into mine gold and sand gold two kinds. Mineral gold, also known as alloy gold, produced in the mine, gold mine, mostly with the underground gushing out of the hot spring through the rock of the seam fine and precipitation accumulation, often with quartz sandwiched in the crevices of the rock. Most of the mine gold and other metal companion, which in addition to gold and silver, platinum,