Magnetite is an oxide minerals magnetite ore. Magnetite belongs isometric, Crystal was octahedron, dodecahedron. Crystal surface striped, mostly grain massive clusters, iron black, or with dark indigo color, streak black, semi-metallic luster, opaque. no cleavage, fracture uneven hardness of 5.5 ~ 6.5. 5.16 ~ 5.18g / cm3. density with strong magnetic, brittle, odorless, tasteless. often produced in igneous rocks, metamorphic rocks. seashore sand often exists in our country are mainly distributed in Shandong, Hebei, Henan, Liaoning, Heilongjiang, Inner Mongolia, Hubei, Yunnan, Guangdong, Sichuan, Shanxi, Jiangsu, Anhui and other places .
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