Definition

A type of mineral that is not crystalline and can be seen through. It is usually colored and is made up of water and aluminum silicate. This mineral often forms in layers or shapes like stalactites.

Example

Allophane is often found in volcanic regions where it forms from the alteration of volcanic glass.

Conversation

Have you ever heard of allophane?

No, I haven't. What is it?

It's a colorful mineral that's often found in interesting shapes.

That sounds fascinating! I’d love to see some in person.

Synonyms & Antonyms

Root Explanation

Allophane is derived from the Greek roots 'allo-' (meaning other) and 'phaino' (meaning to show or to appear). The term refers to a mineral that appears in different forms, hence the name 'other appearance.'

Memory Tip

Think of 'other' ('allo-') and 'show' ('phaino') to remember that allophane refers to a mineral that shows different appearances.

Visually Confused Words