Which type of crystals form in intrusive rock?

Intrusive rocks, also known as plutonic rocks, typically form larger crystals due to their slow cooling process beneath the Earth's surface. Common types of crystals found in intrusive rocks include feldspar, quartz, and mica. These minerals crystallize slowly from magma, resulting in the coarse-grained texture characteristic of rocks like granite and diorite. The size and arrangement of these crystals can provide insights into the cooling history and composition of the magma.