Is it coal? From a fire?

[Gumba143]

Found in a field, very lite in weight, registers 45 on my Garrett AT Max

 

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[bradyboy]

volcanic material?

 

[Gumba143]

volcanic material?

Found in mn... does anyone know much about black lava rock?

 

[bradyboy]

first off, you can buy it by the bag load for landscaping and fire pits

 

[CRUSADER]

It looks similar to the coke we find from the old steam engines. (tractors etc)

 

[Digalotajunk]

Was also going to ask, if a train track was nearby.