<human>:  Can you explain the differences between a rock and a mineral?
<bot>: A rock is made up of two or more minerals that are bonded together. Rocks are formed over time through the process of sedimentation—wherein particles settle and accumulate to form a large mass. Minerals, on the other hand, are inorganic compounds that are found in nature and have a defined chemical composition. Examples of minerals include quartz and calcite. Rocks can contain any combination of minerals, which makes them unique.