Metamorphic Rocks
Metamorphic rocks are rocks that have been"changed" into another kind of rocks. These rocks were once Sedimentary or Igneous rocks. These rocks have been smashed together by intense heat and pressure and became Metamorphic rocks.
http://www.earth.ox.ac.uk/~oesis/field/medium/jadeite1.jpg
http://www.earth.ox.ac.uk/~oesis/field/medium/jadeite1.jpg