This document discusses different types of rocks and minerals. It defines a mineral as a nonliving thing that has different colors and shapes. It then lists some common minerals like calcite, feldspar, mica, and hornblende. The document also briefly introduces igneous rocks, sedimentary rocks, and metamorphic rocks. Finally, it provides a simple diagram of the rock cycle showing how rocks can be transformed between igneous, sedimentary and metamorphic rocks through melting, cooling, weathering and other geological processes.