Igneous rocks

Igneous rock is rock formed from incandescent magma that cools into solid. There are three kinds of igneous rocks based on where the cooling, namely:
1. Frozen in stone / stone edge / plutonic. Stone edge is formed deep within the earth's crust and is made up of crystals alone. Because of the slow cooling, the crystals were large and perfect (holokristaltik). Example: granite.
2. Igneous rock outside / effusive / extrusion rock / volcanic, with amorphous structure (unstructured). For example pumice.
3. Igneous rock alley / excavation rock. These rocks formed in the excavation, or alleys. Because of its place near the surface, more rapid cooling. That's why rock is composed of large crystals, small crystals, and even some that do not crystallize. For example, amorphous material. For example: fosfir granite.