Here's why:
* Geologic Processes: Minerals are formed through various geological processes, such as:
* Crystallization from magma or lava: As molten rock cools, minerals crystallize.
* Precipitation from water: Dissolved minerals in water can precipitate out as the water evaporates or cools.
* Metamorphism: Existing rocks can be transformed into new rocks and minerals under high pressure and heat.
* Weathering and erosion: Rocks break down into smaller pieces, and minerals can be concentrated through this process.
* Not Human-Made: Minerals are distinct from materials created by humans (synthetic materials).
Therefore, the natural origin of minerals is a key defining characteristic.
