Mica (noun)

1. A mineral that is a complex silicate, typically occurring as thin, flat, hexagonal crystals that are easily split into very thin sheets.
2. A mineral composed of silicate minerals and it's often found in metamorphic rocks.

Origin:

From the latin word "mica" which means "crumb".

Examples:

1. Mica is often used in electrical insulation due to its ability to withstand high temperatures.
2. Mica is found in many types of rocks including granite and gneiss.
3. The mineral mica is used in cosmetics and paint.
4. Mica flakes are used as a decorative element in some crafts.
5. Mica is a common mineral and is found in many different types of rocks.