Granite

Granite  is placed in sustained masses with various sizes and at various depths below ground. You can find granite in mountains, but also underlying other rock types. Granite is often abundant near gneiss and is found in the continental crust (the continental crust is present on land and can continue under the oceans). Caves can be found in granite.

Granite can be turned into bricks with sandpaper.

Cordierite and feldspar can be found in granite.