Coal Ore

"Veins of coal ore vary in size - you might only find a few blocks together close to the surface, but underground you'll find much bigger clumps - especially if there's a fossil in the neighbourhood."

- Duncan Geere

Coal ore is a mineral block that drops coal when mined.

Natural generation
Coal ore can also replace some part of polished andesite and diorite in woodland mansions, igloo basement, and snowy tundra village houses.

Coal ore is also found in small amounts alongside underground fossils.

Mineral veins
Coal ore can generate in the Overworld in the form of mineral veins. Coal ore attempts to generate 20 times per chunk in veins of size 17, from altitudes 0 to 128, in all biomes.

From block loot
The block itself can be obtained via Silk Touch.

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