Igneous- formed when molten magma cools
Sedimentary- formed when matter is compressed
Metamorphic- formed when rocks are exposed to different temperatures and pressure conditions than original rock was formed in.
Examples of Igneous:
pumice and basalt
Examples of Sedimentary:
limestone and sandstone
Examples of Metamorphic:
marble and slate
*all pictures from rocksandminerals4u.com
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