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Geology, Palaeontology & Archaeology / Re: Resembling corroded pieces of metal, what are these stones?
« on: 11/05/2018 01:04:28 »hematite
thanks for the reply, i am aware of iron in milestones but normally they iron in them is brittle - not as dense and sturdy as these rocks.
when put in vinegar theirs some bubbles, but very little and from the surface material on the stone (so i think the bubbles might be unrelated to the material)