✅ SOLVED Misterious Rock

IamCurious

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Hi, so today out in a nearby field i found this rock which looks volcanic to me, but i dont have much experience...
Its was found in a field near a city which doesn't have any volcano activity there or even close, in fact the country (Portugal) does not have or had any active volcanoes.
The rock has some shine to it and some iridescent in certain areas.
Please help , i am curious. Rock1.webpRock2.webp
 

Slag from smelting. industrial refining, etc.
 

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AU Seeker nailed it... iron ore slag. :thumbsup:

Dave
 

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