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Intrusive igneous rocks have a shiny appearance because they form slowly, giving them larger crystals.

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Q: Why do intrusive igneous rocks have shiny appearances?
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What is the luster of igneous rock?

i think that igneous and metamorphic rocks uses luster because maybe they have it in them


Why do igneous rocks that cool quickly have smooth and shiny textures?

because the magma does not have as much time for crystals to form inside the igneous rock therefor it is a fine-grained rock


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