Here's why:

* Igneous rocks are formed from the cooling and solidification of magma or lava.

* Metamorphic rocks are formed when existing rocks are transformed by heat, pressure, or chemical reactions.

* Sedimentary rocks are formed from the accumulation and cementation of sediments.

Bricks are made by firing a mixture of clay and other materials in a kiln. The heat causes the clay to harden and form a solid block. This process does not involve any of the natural geological processes that form rocks.