Here's why:
* Natural: Minerals are found in nature, not created artificially.
* Inorganic: They are not derived from living organisms.
* Solid: They have a definite shape and volume at room temperature.
* Specific Composition: Each mineral has a specific chemical formula, meaning it is made up of the same elements in a fixed ratio.
* Structure: Atoms within a mineral are arranged in a specific, repeating pattern, forming a crystal lattice.
Examples of minerals include quartz, diamond, calcite, and feldspar.