Intrusive Igneous Rocks (formed underground):
* Gabbro: A dark-colored, coarse-grained rock similar to basalt but formed deep underground.
* Diorite: A medium-grained, usually gray, rock that is intermediate in composition between granite and gabbro.
* Syenite: Similar to granite but with less quartz and more sodium-rich feldspar.
* Peridotite: A very dense and dark green rock rich in olivine and pyroxene, often found in the Earth's mantle.
Extrusive Igneous Rocks (formed above ground):
* Andesite: A volcanic rock intermediate in composition between basalt and rhyolite, often gray to dark gray in color.
* Scoria: A volcanic rock similar to pumice but with a more angular, clumpy texture.
* Tuff: A rock formed from the consolidation of volcanic ash. It can vary greatly in appearance.
* Dacite: Similar to rhyolite but with a slightly higher amount of mafic minerals, making it darker in color.
Other Interesting Igneous Rocks:
* Pegmatite: An extremely coarse-grained granite, sometimes containing large, beautiful crystals.
* Kimberlite: A rare, deep-seated igneous rock that brings diamonds to the surface.
* Komatiite: An ultramafic rock that is very rare and formed in the Earth's early history.
This is just a small sampling of the wide variety of igneous rocks that exist! The specific types of igneous rocks found in a given location depend on the chemical composition of the magma or lava, as well as the conditions under which the rock formed.
