Anyone good with rocks?

[Soccerkid830]

Picked up a bunch of these rocks and trying to figure out what they are. I had them just sitting on a shelf and now I want to figure out what mineral they are, just because...

Anyone know what these might be? Or any websites that might be able to help me identify them? I tried reverse image searching to see if something similar would come up to no avail...

The two in the pictures are about an inch and some change long by about half an inch high. So the pockets are fractions of an inch.

 

[ImcLoud]

use the rock key... Rock Key
where are you located any copper there..

 

[Soccerkid830]

Those came from Northwest Michigan, in the lower peninsula. More specifically, they were in Crystal Lake on the shore and in the water. I do not believe that copper is in abundance there. It doesn't quite have the same green as oxidized copper in my opinion.

 

[j_garcia]

Looks like some sort of volcanic rock to me, and apparently Michigan does have areas where this might be the case per USGS:

Within Michigan, the oldest Precambrian rocks have been subjected to at least three major periods of crustal deformation and mountain building and to at least three or four additional minor or local deformational episodes. In many cases these crustal crumplings were accompanied by the intrusion of molten masses of granitoid igneous rocks emplaced deep within the crust and subsequently unveiled by uplift and erosion. Periods of volcanism (at least four) produced lava and pyroclastic rocks, chiefly of basaltic composition and accompanied by dikes of diabase and gabbro.

 

[Soccerkid830]

Looks like some sort of volcanic rock to me, and apparently Michigan does have areas where this might be the case per USGS:

That's what I was thinking based on the bubbles and whatnot.

use the rock key... Rock Key
where are you located any copper there..

After going through this, I came to the conclusion that it is likely Scoria, seems to fit the description fairly well:

36.

SCORIA (score'-ee-uh)

What Type of Rock Is It? Igneous What Does It Look Like? The color is usually black, dark gray, brown, or dark green. Scoria is glassy, smooth to rough, and contains gas bubbles. Unlike pumice, it has many fewer, usually larger bubbles, and is moderately heavy. What Minerals Make Up the Rock? mainly a glass How Was It Formed? Scoria usually is from the top of a lava flow, so it is volcanic. It forms from a somewhat sticky lava. Because it is on the top of the flow, it cools rather quickly, before many crystals start to form.

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[fuzz092888]

After reading the title, clicking, and finding out this wasn't drug related, I was immediately disappointed

 

[Soccerkid830]

After reading the title, clicking, and finding out this wasn't drug related, I was immediately disappointed

You could try to smash them up if you wanted. I'm sure I have an extra one or two lying around.