Coal

Coal is a source of energy used inside furnaces, it can be obtained by mining coal ore or you can smelt wood (Any wood) and get charcoal which is the same time inside furnaces. Coal is the 2nd highest duration inside smelting but, bucket of lava is longer. Most people mainly use coal rather than using wooden planks or sticks for smelting as wooden planks only last for 1 and 2/10 only. Sticks can't even last 1 item.

How to craft?
Coal cannot be crafted, it can be made from smelting however, that just gives us crafters, miners and griefers charcoal. There still is a way to get coal, which is by mining coal ore which will drop 1 coal.