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

[Raymodj]

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...

 

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[TreasureCatto]

I believe you found a bit of Glass slag. Due to brown translucence and glassy appearance.

 

[Raymodj]

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.

 

[traveller777]

Do a streak test. Simple and easy.

 

[Raymodj]

I believe you found a bit of Glass slag. Due to brown translucence and glassy appeao zk thanks

I believe you found a bit of Glass slag. Due to brown translucence and glassy appearance.

Ok thanks. I posted again before seeing your response.

 

[Raymodj]

Do a streak test. Simple and easy.

I was trying on back of tile. Thought I read that somewhere. Was getting nowhere so did a hammer test. Slag glass it is.

 

[traveller777]

I was trying on back of tile. Thought I read that somewhere. Was getting nowhere so did a hammer test. Slag glass it is.

View attachment 2034911

Ok. Thanks for response.

 

[mdc002]

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...View attachment 2034885View attachment 2034889View attachment 2034890 View attachment 2034887

Obsidian. Volcanic glass.