What Are The 3 Minerals In Granite

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.

What are the 3 minerals in granite.

Other common minerals include mica muscovite and biotite and hornblende see amphibole. Other minerals which may also be present are muscovite and biotite micas. It forms from the slow crystallization of magma below earth s surface. It is mainly composed of quartz and feldspar although it may contain smaller amounts of other minerals such as mica and amphibole.

Granite mineralogy varies widely but in general granites contain both plagioclase and alkali feldspars along with quartz. Granite coarse or medium grained intrusive igneous rock that is rich in quartz and feldspar. 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. Granite is a light colored igneous rock with grains large enough to be visible with the unaided eye.

Learn more about the properties and uses of granite in this article. 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. These minerals make up more than 80 of the rock. Crushed limestone is by far the most commonly used crushed rock in the u s representing 70 of total.