rocky reef stone cut out natural coastal rock and oysters perched |
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| navigate by keyword : background beach been black carbon coal coastal composed crystal crystals cut decoration different fossil fuel fused geologists geology gold granite have isolated lump macro metal metamorphic mine mineral minerals mining natural nature nonfoliated object ore oyster oysters perched piece pyrite quartzite reef rock rocks rocky sandstone solid stone strange substance together white |
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| To geologists, a rock is a natural substance composed of solid crystals of different minerals that have been fused together into a solid lump. |
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