* Diamagnetic materials are weakly repelled by a magnetic field. They have no unpaired electrons and are not attracted to magnets. Examples include water, copper, gold, and diamond.

* Paramagnetic materials are weakly attracted to a magnetic field. They have unpaired electrons, but the attraction is very weak and disappears when the magnetic field is removed. Examples include aluminum, platinum, and oxygen.

In addition to these two categories, non-magnetic materials can also refer to materials that are not easily magnetized, such as:

* Ferromagnetic materials (e.g., iron, nickel, cobalt) that have been demagnetized.

* Non-metallic materials (e.g., plastic, wood, glass) that are not inherently magnetic.

It's important to note that the term "non-magnetic" is sometimes used loosely and can be a bit ambiguous. It's always helpful to consider the specific context and the intended meaning of the term.