gneiss rock isolated white background |
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| navigate by keyword : abundant amethyst arranged background bands black carbon chemical coal coarse composition crust crystal earths foliated fossil fuel gem geology gneiss grains isolated layers macro material metamorphic mineral minerals mining most natural nature one ore piece quartz raw rock shallow stone surface texture varying which white |
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| Gneiss is a foliated metamorphic rock in which the coarse mineral grains have been arranged into bands or layers of varying mineral composition. |
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