Fayalite is a mineral belonging to the olivine group, primarily composed of iron and silicate. Its chemical formula is Fe2SiO4, indicating that it contains iron (Fe) and silicon (Si) in its structure. Fayalite typically appears in shades of green to brown and is commonly found in igneous rocks, particularly in basalt and peridotite. This mineral is significant in geology and petrology, as it helps scientists understand the conditions under which certain rocks form. Fayalite can also be used in various industrial applications, including the production of ceramics and glass, due to its high melting point and thermal stability.