Non-foliated rocks are a type of metamorphic rock that do not exhibit a layered or banded appearance. Unlike foliated rocks, which have distinct layers due to the alignment of minerals under pressure, non-foliated rocks are typically formed from the recrystallization of minerals without significant directional pressure. Common examples include marble and quartzite. These rocks are often composed of a single mineral or a mixture of minerals that are interlocking. The lack of foliation means that non-foliated rocks can have a more uniform texture and color, making them popular choices for construction and decorative purposes.