* Hardness is relative: The Mohs hardness scale measures a mineral's resistance to scratching. Metamorphic rocks are made up of different minerals, so their overall hardness varies.
* Examples of soft metamorphic rocks: Slate, talc schist, and some marble can be relatively soft, meaning they can be scratched with a fingernail or a copper coin.
* Examples of hard metamorphic rocks: Quartzite, marble (depending on the purity), gneiss, and some schists can be very hard, requiring tools like steel to scratch them.
Therefore, you can't say definitively if metamorphic rock is soft or hard without knowing the specific type of rock.
