Definition

A type of dark, shiny glass that is formed from cooled lava and is often used for making tools and jewelry.

Example

The ancient people used obsidian to create sharp tools and weapons.

Conversation

Have you ever seen a piece of obsidian?

I think I have, but I'm not sure what it looks like.

It's that shiny black volcanic glass, really smooth.

Oh, I remember now! It’s pretty cool how it forms from lava.

Synonyms & Antonyms

Root Explanation

Obsidian originates from the Latin word 'obsidianus', which is derived from 'Obsius', a Roman who is said to have discovered the stone. The term refers to a naturally occurring volcanic glass formed from rapidly cooled lava. Thus, obsidian is essentially named after its discoverer, linking it to its geological nature as a glassy rock.

Memory Tip

Think of the name 'Obsius' as a person who found this unique volcanic glass, helping you remember that obsidian is a type of natural glass formed from lava.

Visually Confused Words