Here's why:

* Igneous rocks are formed from the cooling and solidification of magma (molten rock) or lava.

* Phaneritic texture describes the visible, large mineral grains within the rock.

Some examples of igneous rocks with phaneritic textures include:

* Granite: A common, light-colored rock with large grains of quartz, feldspar, and mica.

* Gabbro: A dark-colored rock with large grains of pyroxene and plagioclase feldspar.

* Diorite: A medium-colored rock with large grains of plagioclase feldspar, hornblende, and biotite.

Other factors that can influence grain size:

* Cooling rate: Slower cooling allows more time for mineral crystals to grow, resulting in larger grains.

* Composition: The chemical composition of the magma can influence the types of minerals that form and their sizes.