❌ are formed dur to physical and chemical changes in igneous, sedimentary rocks. These changes happens due to heat and pressure. Marble is formed from sedimentary rock limestone and it is used in making statues. Slate is formed from shale and used in making bricks and cement. Gneiss is formed from granite and used in building stones. Quartzite is formed from sandstone and used in glass/ceramic industries.
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Metamorphic rocks
Metamorphic rocks