Topic: Hard Coal
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What is the hardness of anthracite coal?
Because it is a rock, not a mineral, the Mohs value will vary significantly from sample to sample. An average range would be between 3.0 and 3.8. Read More »
Source: http://wiki.answers.com/Q/What_is_the_hardness_of_anthracite_coal
What is the hardness of bituminous coal?
5.5 is the hardness of bituminous!!! Read More »
Source: http://wiki.answers.com/Q/What_is_the_hardness_of_bituminous_coal
What are hard coals
Hard coal - a hard natural coal that burns slowly and gives intense heat Read More »
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Hard Coal
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Answers to Other Common Questions
Coal, as an organic sedimentary rock, is not determined to have a hardness on the Mohs scale of mineral hardness.
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what would you use the mohns scale of hardness for
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anthracite; anthracite coal; hard coal
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Anthracite.
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Pennsylvania.
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You can purchase that type of hat at www.fiberglasshardhat.com i bought one from those guys and loved it so much everyone on my unit wears one.
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Source: http://wiki.answers.com/Q/Where_to_get_low_profile_hard_hats_for_...
