Natural iron ore can be called strange stone aggregate, generally referring to pyrite. Pyrite is often mistaken for gold because of its light brass color and bright metallic luster, so it is also called "fool's gold". Pyrite is also an ancient gem. In Victorian England (A.D. 1837- 190 1), people liked to decorate this gem with special shape and ornamental value. It can be used not only for grinding precious stones, but also as a base for jewelry, jade and other handicrafts.

Be distributed

The world-famous producing areas are Spain, Czech Republic, Slovakia, the United States and China. China's proven reserves of pyrite rank among the top in the world, and the famous producing areas are Yingde and Yunfu in Guangdong, Maanshan in Anhui and Baiyin Factory in Gansu. Pyrite is the most widely distributed sulfide in the crust. In magmatic rocks, pyrite is finely disseminated and is the product of post-magmatic hydrothermal process. In contact metasomatic deposits, pyrite often coexists with other sulfides and was formed in the late stage of hydrothermal process.

In hydrothermal deposits, pyrite coexists with other sulfides, oxides and epochs. Sometimes a large number of pyrite deposits will be formed. In sedimentary rocks, coal measures and sedimentary deposits, pyrite appears as massive, nodular or lenticular. In metamorphic rocks, pyrite is often a new product of metamorphism.