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.

Crushed limestone is by far the most commonly used crushed rock in the u s representing 70 of total. 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. It forms from the slow crystallization of magma below earth s surface.

Other minerals which may also be present are muscovite and biotite micas. Other common minerals include mica muscovite and biotite and hornblende see amphibole. Learn more about the properties and uses of granite in this article. It is mainly composed of quartz and feldspar although it may contain smaller amounts of other minerals such as mica and amphibole.

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. Granite is mined as either crushed stone or dimension stone mainly using open pit mining methods. These minerals make up more than 80 of the rock. Granite is composed mainly of quartz and feldspar with minor amounts of mica amphiboles and other minerals this mineral composition usually gives granite a red pink gray or white color with dark mineral.