The three correct statements about minerals are:
- Minerals are made of one element or one compound of elements.
- Minerals are the components that make up rocks.
- Minerals are naturally occurring substances.
The other statements are not true; specifically, "Rocks are the components that make up minerals" is incorrect, and "Observing one property is often the best way to identify minerals" is misleading, as multiple properties are typically needed for accurate identification. Additionally, identifying minerals solely by their color and hardness is insufficient, as many minerals can share similar colors or hardness levels.