magnetitite

例句：

1. 1.The magnetite crystals are found in the earth's crust.
   磁铁矿晶体存在于地球的地壳中。
2. 2.Magnetite is a common mineral that can be used to make magnetic recording devices.
   磁铁矿是一种常见的矿物，可以用来制造磁性记录设备。
3. 3. The magnetite deposits are rich in iron and can be mined for industrial use.
   磁铁矿矿床富含铁元素，可用于工业用途开采。