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Rough specimen of black coal, a combustible sedimentary rock

Stock Photo:
Image ID: 101633617
Copyright:
Small
489x500 6.8"x6.9" (72dpi) 171 KB
Med
977x1000 3.3"x3.3" (300dpi) 661 KB
Large
4773x4885 15.9"x16.3" (300dpi) 6.6 MB
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