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HARD COAL Anthracite coal Go on to: #1 | #2 | #3 | #4 
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Composition
Partially decayed organic matter |
Description
Black, shiny, homogeneous, breaking with a conchoidal fracture.
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Tectonic Association
None specific
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Formation & Environments
Anthracite coal forms when bituminous coal undergoes very low grade metamorphism, accompanied by structural deformation. The fixed carbon content under these conditions reaches 85-95%.
If anthracite is metamorphosed further it turns into graphite.
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