macro shooting specimen biotite granite gneiss rock isolated white background |
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| navigate by keyword : background been biotite black boulder close closeup coal composed conglomerate crystal crystals different floating fused geology gneiss granite gray hard have hematite iron isolated lump macro material mine mineral minerals natural nature object ore pumice raw red rock rough shale shooting solid specimen stone substance texture together white |
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| 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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