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Ever held a stone and wondered if it stays the same forever? Their differences come from how they form. Igneous rocks form when magma or lava cools and hardens; granite and basalt are examples. Sedimentary rocks form as sediments settle in layers, then compact and cement together, like sandstone and limestone. Metamorphic rocks form when existing rocks change under intense heat and pressure; marble and slate are examples. But these are not separate boxes. Limestone becomes marble, shale becomes slate, and granite becomes gneiss-examples, not a complete list. A rock's type tells how it formed; it can change into another type. The Rock Cycle connects them; it's not one fixed route every rock follows. So, do rocks stay the same forever? No: cooling forms igneous rock; layers compact and cement into sedimentary rock; heat and pressure form metamorphic rock.