- Hardness is a property of a material / an object and includes ordered values of malleable / rigid
- A mineral is a kind of solid / natural material
- Therefore, hardness is a property of minerals

- Hardness is a property of minerals
- The properties of something can be used to identify that something
- Therefore, hardness can be used to identify minerals

Hence, hardness can be used to identify minerals
Q: Which of the following properties provides the BEST way to identify a mineral?
Context:
- Hardness is a property of a material / an object and includes ordered values of malleable / rigid 
- The properties of something can be used to identify that something 
- A mineral is a kind of solid / natural material