It really won't matter to him infect he does not put coal in your stockings his magical elves do so just might get hard coal or soft coal
The hardness or softness depends on which state the carbon is in. Carbon can be found in coal and graphite (which isn't very hard) , but it can also be found in diamonds......which are.....hard.
Hard coking coal has higher carbon content and produces stronger coke upon heating, making it ideal for steel production. Soft coking coal has lower carbon content and produces weaker coke, often used in energy production or blending to achieve desired coke quality.
Coal is typically considered to be a hard, black or brownish-black sedimentary rock formed from the remains of plants that lived millions of years ago. While it may not be as hard as some rocks, it is not classified as soft like clay or sand.
Bituminous coal, or soft coal
The two main forms of coal are anthracite and bituminous. Anthracite is the highest rank of coal and is a hard, glossy black rock. Bituminous coal is a softer coal that contains a tar-like substance called bitumen.
Bituminous Coal exists in the geological area known as The Pittsburgh Coal Seam-- an area extending from Western Pennsylvania, Western West Virginia, Ohio, Kentucky, and Indiana. Though mined since the days of Native American Indians, and heavily mined since 1800, it is estimated there is still enough coal in this large seam to last millions of years. Bituminous coal is a soft coaland was well-suited to burning in factories and homes, and thus, held more demand and higher price.
Anthracite coal is the softest type of coal. It has a low carbon and energy content, making it less dense and softer than other types of coal such as bituminous and lignite.
A soft brown coal with less moisture is called bituminous coal.
Coal energy is present in coal. There are two types of coal: bituminous, or 'soft' coal, and anthracite coal, or hard coal. Coal is a hard rocky substance that is the left-over carbon from huge amounts of plants from ages past which died, and have been covered over by sometimes thousands of feet of rock and dirt.
Soft coal, also known as bituminous coal, is a type of coal that is relatively soft and contains a higher percentage of carbon and volatile matter compared to harder coal types like anthracite. It is commonly used as a fuel source for power generation and heating due to its higher energy content. Soft coal is also known for its smokey burning characteristics.
Hammer crusher is the most popular choice for coal crushing, especially for soft and medium-soft coal, coal gangue, wet and sticky coal.