Which of the following is NOT one of the five major physical properties of minerals?

The five major physical properties of minerals typically include crystal form, density, hardness, color, and streak, among others. While chemical composition is crucial in identifying a mineral and understanding its properties, it is not classified as a physical property. Instead, it refers to the specific arrangement and types of elements within a mineral, which contributes to its overall characteristics but does not fall under the category of physical descriptions such as how a mineral looks or behaves in terms of density or crystal structure.

Crystal form describes the geometric shape of a mineral's crystals, density measures how much mass is contained in a given volume, and magnetism refers to a mineral's ability to attract iron. Each of these plays a direct role in how a mineral is identified and classified based on observable and measurable traits. Therefore, while chemical composition is vital for a comprehensive understanding of minerals, it is distinct from the physical properties used for identification purposes.