What Are The Ingredients Of Granite

The main minerals of granite are feldspar, quartz, black and white mica, etc. The SiO2 content of the rock is greater than 65%, the quartz content is generally 20-25%, and a small amount is 30-35%. The feldspar content is about 67% of the total, which is divided into acid Plagioclase and potash feldspar. According to the change of the ratio of acid plagioclase content/potassium feldspar content, it can be divided into granodiorite, monzonite, and potassium feldspar granite. The granodiorite generally contains about 5% amphibole.