Examples from the Web for magnetite
It is often found, as indicated above, in beds distributed in close conjunction with those of magnetite.
Other minerals, except apatite, zircon and magnetite, are typically absent.
Grains of magnetite occur in serpentine, as an alteration-product of the olivine.
Haematite is sometimes magnetic, and A. Liversidge has shown that magnetite is probably present.
The magnetite or luminous arc-lamp next appeared and met with considerable success.Artificial Light|M. Luckiesh