Help With This Rock

[Billco]

I find a lot of this material when I'm hunting Indian artifacts. The location is north central Alabama. I don't see it anywhere here, except on Indian sites, so I think it was brought in from somewhere else. Can anybody identify the material?

 

Amazon Forum Fav 👍

Agony and Death on a Gold Rush Steamer: The Disastrous Sinking of the Side-Wheeler Yankee Blade - Grab it through Amazon!

[Eu_citzen]

Rhyolite or possibly a chalcedony.