There are two types of Diopside that are gem quality: Chrome Diopside and Black Star Diopside. The Chrome Diopside gets its name from the inclusion of Chromiun, which also gives it its green color. Diopside is derived from two Greek words: dis, which means twice, and opse, which means a side or a face. Diopside refers to the two views of the vertical prism.
Although Diopside crystallizes in various colors, it is usually a low-lustre green. The cleavages (sides coming together) are distinct as they form 87 degree and 93 degrees aspects, which give Diopside its prismatic character.