gneiss rock stone isolated white background metamorphic version granite |
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| navigate by keyword : antimonite ash background banded bit black boulder carbon carbonate clay close coal coarse composed finegrained foliated formed fossil fuel geology gneiss grained granite graphite hard igneous isolated leave macro made marble medium metamorphic metamorphism mineral minerals natural nature nobody object ore paper recrystallized regional rock rocks rough rubbed sedimentary shale slate solid stibnite stone streak sulfide texture version volcanic white |
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| Gneiss is a coarse to medium grained banded metamorphic rock formed from igneous or sedimentary rocks during regional metamorphism. |
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