This mineral is olivine: (Mg, Fe)2SiO4.
The two minerals commonly found in gneiss that contain iron and magnesium are biotite, a dark-colored mica mineral rich in iron and magnesium, and amphibole, a group of dark-colored mineral silicates that also contain iron and magnesium.
Igneous rocks with high iron and magnesium content are known as mafic. This word comes from the combination of the "Ma" for magnesium and Fe for iron, MaFe, Mafic
its silicate
First of all there is no such thing as a mafic or a felsic "mineral". There can be mafic and felsic rocks.Mafic rocks have a high magnesium and iron content.Felsic rocks enriched with lighter elements such as oxygen and silicon.
The mineral Olivine is a series between two end members, fayalite and forsterite. Fayalite is the iron rich member while forsterite is the magnesium rich member.
iron, magnesium
The two minerals commonly found in gneiss that contain iron and magnesium are biotite, a dark-colored mica mineral rich in iron and magnesium, and amphibole, a group of dark-colored mineral silicates that also contain iron and magnesium.
Potassium, Calcium, iron, magnesium.
The mineral olivine is a magnesium iron silicate.
Iron and magnesium oxide can react chemically to form iron(II) oxide and magnesium metal. The reaction occurs when iron is heated with magnesium oxide in a high temperature environment, leading to the transfer of oxygen from magnesium oxide to iron.
Igneous rocks with high iron and magnesium content are known as mafic. This word comes from the combination of the "Ma" for magnesium and Fe for iron, MaFe, Mafic
An anthophyllite is a dark brown amphibole mineral, a mixed silicate of iron and magnesium.
its silicate
First of all there is no such thing as a mafic or a felsic "mineral". There can be mafic and felsic rocks.Mafic rocks have a high magnesium and iron content.Felsic rocks enriched with lighter elements such as oxygen and silicon.
Magnesium and iron
It seems unlikely that dolomite would react with iron to any significant degree. Dolomite is calcium magnesium carbonate; both calcium and magnesium are higher on the activity series than iron.
The first minerals to form when magma cools and is rich in iron, calcium, and magnesium are typically olivine, pyroxene, and/or plagioclase feldspar. These minerals have high melting points and tend to crystallize early as the magma cools.