Rocks are made up of one or more minerals, which are naturally occurring solid substances with a definite chemical composition and crystal structure. The specific minerals present determine the type of rock and its properties.

Here's a breakdown:

* Igneous rocks form from the cooling and solidification of magma or lava. They often contain minerals like quartz, feldspar, mica, and olivine.

* Sedimentary rocks form from the accumulation and cementation of sediments, which are fragments of other rocks, minerals, or organic matter. Common minerals include quartz, feldspar, calcite, and clay minerals.

* Metamorphic rocks form when existing rocks are transformed by heat, pressure, or chemical reactions. They can contain various minerals depending on the original rock and the metamorphic conditions.

So, while rocks themselves are the solid building blocks of the Earth's crust, minerals are the fundamental components that make up those rocks.