Definition

A type of mineral that is usually green or grayish-green, belonging to the amphibole group. It is made up of silicate compounds containing calcium, magnesium, and iron, and can be found in different shapes like fibrous or columnar.

Example

The geologist identified the actinolite in the rock sample as a significant indicator of metamorphic conditions.

Conversation

Have you ever seen a piece of actinolite?

Yeah, I saw one at the rock shop last week. It was stunning!

I love how it looks, especially the vibrant green color of actinolite.

It's definitely a unique mineral, and it has such interesting properties!

Synonyms & Antonyms

Root Explanation

Actinolite is derived from the Greek "aktinos" (meaning ray or beam) and "lithos" (meaning stone). The name reflects the mineral's fibrous structure, which can appear like rays or beams of light.

Memory Tip

Imagine a stone that looks like it has 'rays' or 'beams' coming from it — that's why actinolite is named for its ray-like appearance.

Visually Confused Words