Z-coal 1

A piece of Coal

Z-coal 2

Coal (darker background)

Coal is an item/material that is required to make fire and fire-based weapons/items. When seen in-game, it has a thin white glow around it. This is to make it more visible in darker backrounds. Coal is usually found in small pieces, and you will have to collect pieces in order to make things, as it usually takes 10-15 pieces of coal to make something.