Here's why the answer to your question is a bit more complex:

* Minerals are the building blocks of igneous rocks: Igneous rocks are made up of various minerals that crystallized from the molten rock as it cooled.

* Mineral size varies: The size of the minerals in igneous rocks can vary greatly. This depends on factors like:

* Cooling rate: Rapid cooling leads to smaller crystals (think fine-grained rocks like basalt). Slow cooling allows for larger crystals (think coarse-grained rocks like granite).

* Chemical composition: Different minerals have different crystal structures and growth rates.

So, while igneous rocks are formed from minerals, the size of those minerals is not always small.

Let me know if you have other questions about igneous rocks!