What are the different types of metamorphic rocks and how do they differ from each other?

Metamorphic rocks are classified into two main types: foliated and non-foliated. Foliated rocks, like slate and schist, have distinct layers or bands due to the alignment of minerals during formation. Non-foliated rocks, such as marble and quartzite, lack this layering and have a more uniform appearance. These differences in texture and mineral composition result from varying levels of heat, pressure, and chemical reactions during the rock's transformation.