Red Coal is an improved Furnace fuel that burns longer than regular coal, with an additional cost.
Red Coal is owned by the player that held it last, and uses Grid Power when burned in a Furnace.
By default, it costs 4.0 GP to apply its bonus, and it burns for 8 times as long as regular Coal. If you can't afford the GP cost, it will burn for the same amount of time as regular Coal, without consuming any GP.
Heads up!
For technical reasons, all special mechanics only function when the Red Coal is burned in Furnaces, or other block entities that extend the AbstractFurnaceBlockEntity class.
Obtaining
Red Coal can be obtained by passing Coal through a Resonator, which costs 16.0 GP.
Configuration
The GP cost and the burn time multiplier can be configured.