human
Is there any good information about the different types of sandstone?
assistant
Yes, there is plenty of information available on the different types of sandstone. Sandstone can be classified into three main categories based on its mineral composition: quartz sandstone, feldspar sandstone and mica-rich sandstone. Quartz sandstone has a higher proportion of quartz grains than other minerals and is generally composed of quartz crystals. Feldspar sandstone is made up of two main minerals - feldspars and quartz. Feldspar sandstone is usually white in color due to the presence of these minerals. Mica-rich sandstone contains mica flakes which give it a speckled appearance.