A member of a chemically diverse, structurally related group of minerals that comprise substantial fractions of both the Earth's crust and upper mantle. The term was coined by Albert Johannsen in 1911 to describe collectively the rock-forming pyroxene, amphibole, and mica minerals (biopyribole is a contraction of biotite (a mica), pyroxene, and amphibole). In addition to these common and long-recognized biopyriboles, several other members of the group have been recognised since the mid-1970s.