What is another name for rock salt?

Rock salt is commonly known as halite. This name comes from its mineralogical classification. Halite is the natural mineral form of sodium chloride, which is the chemical name for common table salt. While sodium chloride refers to its chemical composition, halite specifically describes the crystalline form that occurs in nature.

This is essential in geology and mineralogy, where understanding the common terms and classifications helps in identifying and categorizing different minerals accurately. The other options are different compounds or minerals: potassium nitrate is a different salt used mainly in fertilizers, and calcium carbonate is a common mineral found in rocks, but neither pertains to rock salt.