Which feldspar has exsolution lamellae?
Consequently, what type of rock is feldspar?
Feldspars crystallize from magma as veins in both intrusive and extrusive igneous rocks and are also present in many types of metamorphic rock. Rock formed almost entirely of calcic plagioclase feldspar is known as anorthosite. Feldspars are also found in many types of sedimentary rocks.
Subsequently, question is, what are the two most common types of feldspar? Common feldspars include orthoclase (KAlSi3O8), albite (NaAlSi3O8), and anorthite (CaAl2Si2O8). To appreciate the importance of feldspar as a rock-forming mineral, let's consider its abundance in Earth's crust.
Correspondingly, how do you identify feldspar in rocks?
In fact, feldspar is the standard for hardness 6 in the Mohs scale. Feldspars usually are white or nearly white, though they may be clear or light shades of orange or buff. They usually have a glassy luster. Feldspar is called a rock-forming mineral, very common, and usually makes up a large part of the rock.
Where can I find feldspar?
Feldspar is an incredibly abundant mineral. It has been found on the moon and in some meteorites. It also makes up roughly 60% of the Earth's crust. Feldspars are found in the every section of the rock cycle.