Does anyone know what kind of rocks these are?

[chrisdigs]

I found these rocks today while deer hunting at land between the lakes. I know nothing about them ,I'm sure you guys will know. Thanks

 

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[ishotjohnsheriff]

Nice blue slag!

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[chrisdigs]

Thanks , just never seen blue rocks in the woods before, but I'm guessing they are pretty common.

 

[MrLee]

the second photo looks like an agate. Flint and jasper weather different than agate.

 

[chrisdigs]

MrLee ,thanks for the info sir.

 

[stdenis_jd]

The first one looks like slag to me, not 100% tho. I find a lot of slag glass around where I live in Michigan and that looks quite similar. Flint/chert is the most likely tho.

 

[ishotjohnsheriff]

No you are right StDenis. That is blue slag from one of the old iron furnaces. I was wrong to think it was chert.

https://www.geocaching.com/seek/cac...itle=lbl-land-between-the-lakes-iron-furnaces

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[ishotjohnsheriff]

I should have recognized it by that iron oxide crust. The blue MI slag is called Leland Blue I think.

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[stdenis_jd]

If that is Leland Blue, the only place it can be found is on the Leland peninsula Northwest of Traverse City MI. That's worth some decent $ to a lapidary who knows what they're doing...ppl around here buy that stuff like crazy and at ludicrous prices. That bright blue piece is really gonna fetch some loot

 

[ishotjohnsheriff]

It is not Leland Blue. That can only be found in the Michigan area. I shall officially designate it LBL Blue. (For Land Between the Lakes).

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[stdenis_jd]

It is not Leland Blue. That can only be found in the Michigan area. I shall officially designate it LBL Blue. (For Land Between the Lakes).

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Haha LBL Blue...I like it

It'll still make some pretty little pieces in the hands of someone who knows how to work it tho

 

[chrisdigs]

Thanks for the info guys . There was several pieces of this stuff laying around a old dry creek bed makes sense that it was a by product from the old furnaces . There were old ruins that might have been a furnace near by. Thanks again for the replies. So if someone ask what it is I'll just say LBL Blue...ha