The characteristics of metamorphic rock are that some contain layers and streaks of different colors and textures caused by different minerals. Other metamorphic rocks are more uniform in color and texture and have minerals arranged in parallel layers.
Metamorphic rocks are changed over eons from one type of rock to another through heat and pressure in the earth's crust. Eventually, they're heaved up to the surface of the earth. Examples of metamorphic rocks include marble, which is derived from limestone, quartzite, which is derived from sandstone, serpentine, which is derived from rocks like olivine, and amphibolite, which is derived from basaltic lava.