Minecraft wiki entry for Coal_Ore, associated text: A blob of coal ore found in a giant tree taiga cliff.
A blob of coal with surrounding blocks excavated.
A blob of coal naturally occurring in a desert.
A block of coal ore found underwater. The glowstone is placed by the player.
A coal blob in a mushroom biome hillside.
A 20-block blob of coal ore found in a ravine.
A coal ore blob found in a mountains biome.
One coal ore blob that generated close to the surface in a cave opening.
A blob of coal ore above a lake of lava.
A blob of coal ore found in Pocket Edition.
Coal ore generated in snowy biome.
Ravine with multiple ores, water and lava falls, and stronghold bridge over it.