For 10 points, name this property of a material that is most often measured on the Mohs scale.
The cloudburst test uses steel balls dropped from a predetermined height to determine it, and its micro-variety can be measured by the Knoop test. The Rockwell test measures it based on resistance to a static or dynamic load, while the Vickers test uses a diamond-pyramid penetrator is used, and the Brinell test uses a tungsten carbide ball's indentation. It is often measured by scratch tests, such as one named after Bierbaum, and another more famous scale. For 10 points, name this property of a material that is most often measured on the Mohs scale.
The cloudburst test uses steel balls dropped from a predetermined height to determine it, and its micro-variety can be measured by the Knoop test.
{hardness}