What Are The 3 Minerals In Granite

Granite is an igneous rock of plutonic origin meaning it formed beneath the surface rather than above ground.

What are the 3 minerals in granite.

It forms from the slow crystallization of magma below earth s surface. These minerals make up more than 80 of the rock. The chemical composition of granite is typically 70 77 silica 11 13 alumina 3 5 potassium oxide 3 5 soda 1 lime 2 3 total iron and less than 1 magnesia and titania. It is the most common plutonic rock of the earth s crust forming by the cooling of magma silicate melt at depth.

Granite mineralogy varies widely but in general granites contain both plagioclase and alkali feldspars along with quartz. Other common minerals include mica muscovite and biotite and hornblende see amphibole. Crushed granite represents 16 of the total crushed stone produced in the u s and it is the second most utilized crushed stone in the u s. Other minerals which may also be present are muscovite and biotite micas.

Learn more about the properties and uses of granite in this article. Crushed limestone is by far the most commonly used crushed rock in the u s representing 70 of total. It is mainly composed of quartz and feldspar although it may contain smaller amounts of other minerals such as mica and amphibole. Granite is a light colored igneous rock with grains large enough to be visible with the unaided eye.