Interesting Banding!

This rock appears to be a type of quartzite, which is a metamorphic rock derived from sandstone. The rock shows signs of recrystallization, where the original grains have been transformed into a more interlocking, crystalline structure typical of quartzite. This process usually happens under high temperature and pressure conditions without melting the rock, leading to a harder, more durable stone. The presence of white and brown colors with some banding or veining suggests it might have impurities or different mineral inclusions, which is common in quartzite.