Haematite is a special case of the more general ilmenite structure.

赤铁是更为一铁型结构中一个特情况。

Quartz, zircon, magnetite, gold are major constituents of littoral placers in Shandong province, while shell, ballstone, ilmenite, rutile being secondary.

山东省滨海砂英、锆英、磁铁、砂金等为主,其次为贝壳、球、铁、金红等。