✅ SOLVED Dug up black rock abt 6" down. Or glass?

Raymodj

Tenderfoot
Jul 2, 2022
6
9
Dug this up in my yard in Minneapolis Minnesota. Next to fence post. A rock ID app says obsidian but that seems unlikely around here.

I'm just curious. I do find broken glass, but not colored glass and not this thick. I couldn't scratch it with metal... 20220702_195538.jpg 20220630_154928.jpg 20220630_154918.jpg 20220630_154953.jpg
 

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HuntH2002

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May 27, 2018
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I believe you found a bit of Glass slag. Due to brown translucence and glassy appearance.
 
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Raymodj

Tenderfoot
Jul 2, 2022
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9
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Just adding that it's very hard, can't chip off very narrow edges like glass might. Also photos are deceptive. Here's a photo from above and then from the side without moving the rock.
20220702_211307.jpg
20220702_211402.jpg
 
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mdc002

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Jun 25, 2022
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