Emery

Of mineral and emery paper.

A hard grey-black mineral consisting of corundum and either hematite or magnetite; used as an abrasive (especially as a coating on paper).

This concept's ID is @1~74080

Iron Ore

  • hematite 0 facts

    The principal form of iron ore; consists of ferric oxide in crystalline form; occurs in...

  • magnetite 0 facts

    An oxide of iron that is strongly attracted by magnets.

Also contains

  • corundom 3 facts

    Very hard mineral used as an abrasive.