Please help identify

[icclemisscrazy]

Hi, I found this today, can someone please help identify what this is. Thank you in advance.

 

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[2Minnesota]

Is it a rock? Plastic? If rock maybe try the rock forum.

 

[icclemisscrazy]

Is it a rock? Plastic? If rock maybe try the rock forum.

It seemed like rock but glass inside, I will try the rock forum, sorry new to the forum. Thanks.

 

[JimDon]

It sort of looks like Obsidian to me.

 

[mcb66]

It looks like furnace glass to me. Waste material from an old kiln. Often found near early iron ore extraction kilns.

 

[bocaratonmatt78]

Flint

 

[villagenut]

It looks like one of those touristy cut geode rocks that are used for bookends. I have bought these in Tennessee before. They polish up the cut side and are neat looking, maybe yours is one of those that got busted up.