How do you describe how hard a rock is?

The hardness of a rock is typically described using the Mohs scale of mineral hardness, which ranks minerals from 1 to 10 based on their ability to scratch one another. For example, talc is rated as 1 (very soft), while diamond ranks as 10 (extremely hard). Additionally, hardness can be assessed through tests like the scratch test, where a harder material can scratch a softer one. In practical terms, a rock's hardness affects its durability and suitability for various uses, such as construction or jewelry.