* Quartz: A hard, glassy mineral that gives granite its sparkle and its light color.
* Feldspar: A group of minerals that give granite its color, ranging from white to pink to grey.
* Micas: These are shiny, flaky minerals, often appearing as black or dark brown flecks in granite.
* Amphibole: A group of minerals, including hornblende, which are dark green to black and give granite a slightly darker tone.
In summary, the primary mineral composition of granite is:
* Quartz (SiO2) - 20-60%
* Feldspar (KAlSi3O8, NaAlSi3O8, CaAl2Si2O8) - 20-60%
* Micas (KAl2(AlSi3O10)(OH)2, KMg3AlSi3O10(OH)2) - 5-15%
* Amphibole (Ca2(Mg,Fe)5Si8O22(OH)2) - 0-15%
Note: The specific mineral composition of granite can vary depending on its origin and the geological conditions under which it formed. These proportions can vary slightly from one granite to another.
