Rock ID

[Bum Luck]

All right, here's the try without pictures.

I found it in Wisconsin, in the glaciated part.

It's about 3 1/2 inches across and rounded. I picked it up from millions of other stones since it looked hematitic; dark grey/black but with red inclusions about an 1/8", lots of them. It's heavier than most rocks. It's got a 'solid' look, almost like a black quartz or chalcedony, so it looks more like a mineral. It's not sedimentary.

It's a fairly common rock, I'd guess, or else I'd see it for sale.

Any takers?

 

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[Eu_citzen]

Streak colour?
Magnetic?

I'm tempted to think Magnetite.

 

[Bum Luck]

Finally got around to photoing it.

 

[chadrack]

You have answered your own question. It is jasper, a form of chalcedony, which is quartz. That one would make a good solid hammerstone.

 

[Bum Luck]

Thanks!

I'd maybe make a point out of it, but wouldn't hammer with it.