Extrusive rocks like basalt typically have a fine-grained texture. This is because they cool quickly at the Earth's surface, giving the minerals little time to form large crystals.

Here's a breakdown of the texture you might find in basalt:

* Aphanitic: This means the crystals are so small that they can't be seen with the naked eye.

* Porphyritic: This describes a texture where larger crystals (phenocrysts) are embedded within a finer-grained matrix. This can happen when the magma cools slowly underground before being erupted.

* Vesicular: This refers to the presence of gas bubbles trapped within the rock, creating a "holey" appearance. This is common in basalts due to the rapid release of gases during eruption.

So, while you can't always see the individual minerals, basalt typically has a smooth, dense, and potentially porous texture.