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The hardest and oldest type of coal is called anthracite. It is formed from peat that has undergone significant geological pressure and heat over millions of years, resulting in a high carbon content and low moisture levels. Anthracite is known for its high energy content and is often used for heating and industrial purposes. It is characterized by its shiny, black appearance and is the most metamorphosed form of coal.

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What is the hardest and oldest of coal?

Anthracite is the hardest type of coal.


What is the hardest and oldest type coal?

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Anthracite coal is the hardest and oldest type of coal. It has a high carbon content and is known for its low moisture and high energy content, making it a valuable fuel source. Anthracite coal is formed from the metamorphism of bituminous coal over millions of years.


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Anthracite is the hardest and oldest type of coal. It is known for its high carbon content and low impurities, making it a highly efficient and valuable resource for heating and energy production.


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Anthracite coal is known as the hardest and oldest type of coal. It has a high carbon content and is formed over millions of years under intense pressure and heat. Anthracite coal is prized for its high energy content and low impurity levels, making it a valuable energy source.


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