Definition

A type of hard rock made mostly of silica, often found in limestone, and similar to flint.

Example

Archaeologists discovered tools made from chert in the ancient settlement.

Conversation

I found some interesting rocks during my hike yesterday.

Oh really? What kind of rocks did you find?

One of them was actually chert — it looks pretty unique.

That sounds cool! I've never seen a chert rock before.

Synonyms & Antonyms

Root Explanation

The word 'chert' originates from Middle English 'cherte', which is derived from Old French 'cherte' (meaning a type of flint or stone). It refers specifically to a hard, sedimentary rock that is often used in tool-making.

Memory Tip

Think of 'cherte' as a type of stone used for making tools — that's why 'chert' refers to this specific hard rock.

Visually Confused Words