Here's why:

* Flat: Mica minerals form in sheets, giving them a distinct flat appearance.

* Flaky Cleavage: Mica has perfect basal cleavage, meaning it splits easily into thin, flat sheets. These sheets are often described as flaky.

Common types of mica include:

* Muscovite: A silvery-white to transparent mica.

* Biotite: A black or dark brown mica.

Other minerals that might have similar properties are talc and graphite, but they have a different feel and luster compared to mica.