[Rockhounds] Obsidian in Michigan

[Doug Bank]

I have no idea what this argument is about, but I have found various things on Illinois beaches over the years that look vaguely like obsidian. I am reasonably sure they were all slag. It is sad, but there is an awful lot of slag out there. 

> On Sep 19, 2022, at 5:54 PM, <gbrown at catspaw-minerals.com> <gbrown at catspaw-minerals.com> wrote:
> 
> Hi Kids...
> 
> I'm in a Facebook argument about obsidian in lower Michigan. 
> 
> They don't believe me when I say NOPE.
> 
> *sigh*
> 
> Gary
> 
> 
> 
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