raw chert and shale rock isolated white background |
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navigate by keyword : almost background black chert clastic clipping closeup coal common composed consisting crust crystal earths entirely geology grains granite hard isolated macro material metal metamorphic mineral minerals most natural nature nonfoliated object one ore organic oval path precious quartz quartzite quite raw rock rough round sandsized sandstone sedimentary shale silica stone texture variety ways white |
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Chert is a sedimentary rock consisting almost entirely of silica and can form in a variety of ways. |
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