Help identify this dark green beach rock, Michigan.

[Gentryart]

Prob slag, but the inclusions in the light part don't look like bubbles to me.

 

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[Zep11in]

green obsidian would be my guess

 

[galenrog]

Glass.

Time for more coffee.

 

[charley2hats]

look's like a piece of Jade to me.

 

[stdenis_jd]

it's slag, and those are indeed bubbles. Obsidian isn't found in Michigan unless it is a Native American artifact, received by trade with another tribe.

Green and blue slag are pretty common in these parts