Diorite rock is an example of intrusive igneous rock
    Intrusive igneous rocks:
    •    Igneous rocks made from cooling of solidification of magma.
    •    When magma is cooling below earth surface, (cooling rate is slow) then intrusive rock is formed.
    Ex. Diorite, Granite, Pegmatite, Peridotite, etc.
    Extrusive igneous rocks
    •    When magma is reached earth surface, then it is called lava.
    •    When lava is cooling and they cool quickly to form small crystals, then extrusive igneous rock is formed.
    Eg. Basalt, Dacite, Pumice, Rhyolite, etc.