1. From Magma (Intrusive Igneous Rocks):

- Process: Magma, molten rock beneath the Earth's surface, cools and solidifies slowly. This slow cooling allows for larger crystals to form.

- Example: Granite, Gabbro

2. From Lava (Extrusive Igneous Rocks):

- Process: Lava, molten rock that erupts onto the Earth's surface, cools and solidifies quickly. The rapid cooling results in smaller crystals.

- Example: Basalt, Obsidian, Pumice