* Crust: The outermost layer, this is where we find the most diverse types of rocks, including igneous, sedimentary, and metamorphic rocks. This is also the layer where we find most of the rocks we interact with in our daily lives.
* Mantle: This thickest layer is primarily made up of solid rock, but it can behave like a very viscous fluid over long periods. The mantle is composed mostly of peridotite, an igneous rock.
* Core: This is the Earth's innermost layer, divided into a solid inner core and a liquid outer core. Both are primarily made up of iron and nickel, which are metallic elements and not technically rocks. However, the core is believed to have a solid, crystalline structure due to immense pressure.
So, while all three layers contain materials we could classify as "rocks" based on their solid nature, the composition and characteristics of these materials vary considerably between layers.
