Explanation: Mica is a mineral made up of a series of plates or leaves. It splits easily into thin sheets.

• These sheets can be so thin that a thousand can be layered into a mica sheet a few centimeters high. Mica can be clear, black, green, red, yellow or brown.
• Due to its excellent di-electric strength, low power loss factor, insulating properties and resistance to high voltage, mica is one of the most indispensable minerals used in electric and electronic industries.

Source: NCERT