Hardness generally refers to the resistance of a material to deformation, particularly permanent deformation, scratching, cutting, or indentation. It is an important property in materials science and engineering, as it often correlates with durability and wear resistance. Hardness can be measured in various ways, depending on the material being tested. Some common methods include: 1. **Mohs Hardness Scale**: A qualitative scale ranging from 1 to 10 that ranks minerals based on their ability to scratch one another.
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