Slag

[hvacker]

Thought I'd show y'all this. It's from a chrysocolla copper mine in NM
When I first saw it I wasn't sure what to think. When I showed it around I had a good laugh.
There was a mountain of the stuff. One guy had tried to cab it w/o luck. Said it wasn't pretty inside.(like some people I know?)

 

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[BurntBear]

Cool specimen!