A silicate of iron and magnesium.

is a group of mainly iron and magnesium bearing silicate minerals. See also Silicates.

Common silicate mineral found in rocks formed from mafic magma. Its chemical composition varies between Mg2SiO4 and Fe2SiO4.

(ahl' a veen) - A group of silicate minerals with a compositional range running from all magnesium - forsterite, Mg2SiO4 - to all iron - fayalite, Fe2SiO4 - common in pallasites, chondrites and some achondrites.

A shiny, green mineral found in many igneous rocks that have a high iron and magnesium content. In the presence of liquid water, olivine often alters to form other minerals (such as goethite, maghemite and hematite)

group of silicate minerals including forsterite and fayalite with the general formula (Mg, Fe, Mn, Ca)2SiO4 and usually dark green. Olivines are common minerals in basalts, peridotites and some other igneous rocks. Olivine is the dominant mineralogical constituent of the upper mantle.

a mineral consisting of magnesium iron silicate; a source of magnesium

a gem which comes from the silicate mineral

a greenish, translucent mineral series composed of varying amounts of magnesium silicate and iron silicate.

(Mg,Fe)SiO. A common igneous mineral in peridotite and basalt.

Silicate mineral containing iron and magnesium. A green glassy mineral formed at high temperature. Common in basalt, especially ocean-floor basalt, and in ultramafic rocks. Gem-quality olivine is called peridote. Rock made up entirely of olivine is called dunite.

Olive green.

a mineral group with the formula (Fe,Mg)2SiO4. Olivines exist in mafic and ultramafic igneous rocks as small, sand-sized grains with a yellow-green color.

A green mineral commonly found in basalt lava.

a mineral composed of silica, magnesium and iron that is often found in rocks in the form of green crystals.

A silicate mineral with the general formula (Mg,Fe)25i04

A magnesium-iron silicate occurring in mafic and ultramafic rocks.

a common mineral in igneous (volcanic) rocks, containing magnesium, iron, silicon, and oxygen.

A translucent green mineral made up of iron, magnesium, and silica. It is the most abundant phenocryst in the lavas of Kilauea.

Olivine is a mineral family containing the gemstone peridot.

a greenish or yellow mineral, a silicate of magnesium and iron found in mafic and ultramafic igneous rock. [AHDOS

Magnesium-iron-orthosilicate composed of forsterite and fayalite. Does not contain free silica. Possible molding material.

See Chrysolite and Peridot.

The mineral olivine (also called chrysolite and, when gem-quality, peridot) is a magnesium iron silicate with the formula (Mg,Fe)2SiO4. It is one of the most common minerals on Earth, and has also been identified on the Moon, Mars, and comet Wild 2.