Definition

A type of dark-colored mineral that is a form of mica, commonly found in certain types of rocks and made up of silicate compounds containing iron, magnesium, potassium, and aluminum.

Example

Geologists often study biotite to understand the formation of igneous rocks.

Conversation

Have you ever seen biotite in rocks before?

Yeah, I remember it being a dark color, right?

Exactly! It's usually dark brown or black and quite shiny.

I find it fascinating how it forms in igneous rocks.

Synonyms & Antonyms

Root Explanation

Biotite is derived from 'bio-' (from Greek 'bios', meaning life) and 'tite' (from the suffix used in mineralogy to denote a mineral). The word refers to a mineral that is part of the mica group, often found in igneous and metamorphic rocks, and its name reflects its association with living processes in geological contexts.

Memory Tip

Think of 'bio-' meaning life, which helps you remember that biotite is a mineral often associated with the processes of the Earth that support life.

Visually Confused Words