A common rock-forming mineral, olivine is found in mafic igneous rocks. The rock, dunite, is made up almost wholly of olivine. The transparent gem variety is known as peridot. It derives its name from the usual olive-green color.
Minerals
A common rock-forming mineral, olivine is found in mafic igneous rocks. The rock, dunite, is made up almost wholly of olivine. The transparent gem variety is known as peridot. It derives its name from the usual olive-green color.
Mineral Photos courtesy of R.Weller/Cochise College