Felspar

Felspar

Felspar, also known as feldspar, is a group of rock-forming minerals that make up about 60% of the Earth's crust. These minerals are classified as aluminosilicates, which means they contain both aluminum and silicon, as well as oxygen and other elements such as sodium, potassium, or calcium. Felspars are typically found in igneous, metamorphic, and sedimentary rocks, and they play an important role in the formation and composition of these rocks. There are two main types of felspar: potassium felspar (orthoclase) and plagioclase felspar. Potassium felspar is a common mineral in igneous rocks such as granite, while plagioclase felspar is found in both igneous and metamorphic rocks. Felspars are also important minerals in the formation of sedimentary rocks such as sandstone and shale. Felspars have a wide range of physical and chemical properties, depending on their composition and crystal structure. They can be white, pink, yellow, or gray in color, and they have a hardness of 6 on the Mohs scale. Felspars are also known for their cleavage, which is the tendency to break along flat planes. This property makes them useful in the manufacture of ceramics and glass. In addition to their geological importance, felspars have many industrial applications. They are used in the manufacture of ceramics, glass, and enamel, as well as in the production of aluminum and other metals. Felspars are also used as a filler in paint, rubber, and plastics.

aluminosilicates, igneous rocks, metamorphic rocks, sedimentary rocks, cleavage

— Andrew Smith

CITATION : "Andrew Smith. 'Felspar.' Design+Encyclopedia. https://design-encyclopedia.com/define/felspar?E=269653 (Accessed on October 14, 2026)"