Please help ID this black rock

[Grahamrocks]

We found this in the ocean near Cape Hatteras. Does anyone know what it is? It broke very easily and is shiny on the inside. Thank you!

 

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[Plug N Play]

Might be coal ?

 

[unclemac]

...looks like coal

 

[vpnavy]

You might consider posting your picture on ROCKS/GEMS for more exposure...

 

[bradyboy]

looks like processed coal, maybe briquette
imo
brady

 

[GoldieLocks]

Lava

 

[islamoradamark]

if its coal maybe it came from an old coal burning ship

 

[Charlie P. (NY)]

Welcome to T. Net.

Its looks to be bituminous coal.

 

[Dougie Webb]

If it's coal, it should easily draw a line on paper. Have you tried?