A group of important rock-forming silicate minerals of variable composition, among which calcium-, magnesium-, and iron-rich varieties predominate. Common pyroxenes belong to either the low-calcium enstatite-(ortho)ferrosilite series, (Mg,Fe)SiO, or the high-calcium diopside-hedenbergite series, Ca(Mg,Fe)SiO. Rare pyroxenes include jadeite, aegirine, and johannsenite. See also enstatite.

This entry comes from Encyclopædia Britannica Concise.
For the full entry on pyroxene, visit

Seen & Heard

What made you look up pyroxene? Please tell us what you were reading, watching or discussing that led you here.

Get Our Free Apps
Voice Search, Favorites,
Word of the Day, and More
Join Us on FB & Twitter
Get the Word of the Day and More