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Is coal hard

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Anonymous

7y ago
Updated: 6/6/2024

Anthracite coal is harder than bituminous coal. Anthracite coal has a relative hardness of 1.3 to 1.4. Bituminous coal has a hardness of less than one.

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Kathryne Hintz

Lvl 10
3y ago

What else can I help you with?