Gold (Aurum) is a metallic element with the symbol of Au and the atomic number of 79.

The simple substance (free form) of gold, commonly known as gold, is a precious metal, which has been used as currency, preservation and jewelry for many centuries. In nature, gold exists in the form of simple substance in gold nuggets or rocks, underground veins and alluvium.

gold mine

Gold sometimes exists in nature in the form of compounds, especially gold telluride.

Such as travertine, kyanite, nagyagite, petzite and krennerite. Gold rarely appears in amalgam with mercury, and it also appears in seawater at a low concentration.