Albite

Albite crystallizes with triclinic pinacoidal forms. Its specific gravity is about 2.62 and it has a Mohs hardness of 6–6.5. Albite almost always exhibits crystal twinning often as minute parallel striations on the crystal face. Albite often occurs as fine parallel segregations alternating with pink microcline in perthite as a result of exolution on cooling. There are two variants of albite, which are referred to as low albite and high albite; the latter is also known as analbite. Although both variants are triclinic, they differ in the volume of their unit cell, which is slightly larger for the high form. The high form can be produced from the low form by heating above c. 750 °C (1382 °F) High albite can be found in meteor impact craters such as in Winslow, Coconino Co., Arizona, United States. Upon further heating to more than c. 1050 °C the crystal symmetry changes from triclinic to monoclinic; this variant is also known as monalbite. Albite melts at 1100-1120 °C. Oftentimes, potassium can replace the sodium characteristic in albite at amounts of up to 10%. When this is exceeded the mineral is then considered to be anorthoclase.

It occurs in granitic and pegmatite masses (often as the variety Cleavelandite), in some hydrothermal vein deposits, and forms part of the typical greenschist metamorphic facies for rocks of originally basaltic composition. Minerals that albite is often considered associated with in occurrence include biotite, hornblende, orthoclase, muscovite and quartz.

Albite is used in the creation of glass and ceramics. When it is finely ground and mixed with quartz and kaolin, it binds these component materials together. The albite's fused feldspar is also a main ingredient for the glaze used on porcelain.

It was first reported in 1815 for an occurrence in Finnbo, Falun, Dalarna, Sweden.

Albite is believed to improve memory and cognitive thinking skills. It works with the Crown chakra to stimulate the brain and provide for better clarity and focus. Many use it during meditation to release energy from the Third Eye chakra and help them understand dreams or visions. Can be worn, carried, or placed in the home or workplace.