Here are some common magnetic and non-magnetic materials to help you:

Magnetic materials:

* Iron

* Nickel

* Cobalt

* Steel (which is mostly iron)

* Some alloys (like Alnico)

* Some rare earth elements (like neodymium)

Non-magnetic materials:

* Aluminum

* Copper

* Gold

* Silver

* Plastic

* Wood

* Glass

Please provide me with a list of materials and I can tell you which one is not magnetic.