Diopside is a mineral that belongs to the pyroxene family. It is a common mineral found in metamorphic and igneous rocks. The word "diopside" comes from the Greek word "di" meaning two and "opsis" meaning sight. This refers to the two distinct directions of cleavage that diopside exhibits. Diopside is also known by other names such as chrome diopside, ferrosilite, and hypersthene. Chrome diopside is the green variety of diopside due to the presence of chromium. Ferrosilite is another pyroxene mineral that closely resembles diopside, while hypersthene is a closely related mineral with a similar chemical composition.