Here's the breakdown:
* Diamonds form deep within the Earth's mantle. They require immense pressure and heat, found in the lower mantle.
* Kimberlite magma erupts from the mantle, carrying with it fragments of the surrounding rocks, including diamonds.
* These eruptions create vertical pipes called kimberlite pipes. The magma cools and solidifies, leaving behind a mixture of rocks, minerals, and sometimes diamonds.
* Diamonds are then extracted from the kimberlite.
So, while diamonds are associated with volcanoes, they are not found directly within the volcano itself, but in the surrounding kimberlite rock.