Microcline

Microcline is a common mineral that belongs to the feldspar group. It is a potassium aluminum silicate, and is known for its distinctive light green, blue or yellow color. Microcline is a significant rock-forming mineral in granite and pegmatite.

Characteristics

Microcline is characterized by its triclinic crystal system and its grid-like twinning pattern, known as perthitic texture. This texture is a result of the exsolution of albite and potassium feldspar on a microscopic scale. The mineral's hardness is rated as 6 on the Mohs scale, and it has a vitreous to pearly luster.

Occurrence

Microcline is commonly found in granite and pegmatite, where it often forms large crystals. It can also be found in metamorphic rocks and as a constituent of sedimentary rocks. Notable localities for microcline include the United States, Brazil, Norway, and Russia.

Uses

Microcline is primarily used as a raw material in the manufacture of ceramics and glass. It is also used in the production of porcelain and insulators. In addition, microcline is often collected as a gemstone, particularly the variety known as amazonite, which is prized for its turquoise color.

See also

• List of minerals
• Feldspar
• Potassium
• Aluminum
• Silicate