Chalcopyrite is a copper iron sulfide mineral with the chemical formula CuFeS₂.

Here's a breakdown of its composition:

* Copper (Cu): Approximately 34.5% by weight

* Iron (Fe): Approximately 30.5% by weight

* Sulfur (S): Approximately 35% by weight

Chalcopyrite is a common ore of copper and is often found alongside other copper sulfides like bornite and pyrite.