I found in a friends garden.... If you see in the photo's there is what seems to be a brown edge with a layer of something magnetic... iron maybe? The rest is not magnetic.... The pattern down the sides does not seem to continue through as one of them was cracked open by the friends son. I hope you can maybe help?
Any help would be really appreciated .
OK - no takers...
If you file the thin brown layer, do you see a bright metallic surface? If so, what colour?
The rest does actually seem like rock, yes? (as opposed to, say, hoof)
I have just tried a file on one corner of the brown edge... where the thin line runs through it does indeed look to be of a metal surface....the top brown area reminds me of filling rust ( I deal with a lot of rust looking after a fleet of 20+ year old coaches) I will try get a photo up.
I just noticed how the fillings stick to the thin layer.
Thanks for the further info.
I'm going to have a guess...
It is a piece of waste from an industrial furnace of some sort, eg. a blast furnace. In such devices, scrap metal as well as ore and additives such as fluxes are put into the melt. This specimen looks to be partly melted rock and iron. How the iron (if that is what it is) became stuck to the rock, I don't know.
Perhaps the folks at the museum, with their equipment, can come up with a better idea - one based more on facts. Please contact them about doing so.
Sorry for such a low-confidence reply.
a similar thought did enter my head..... the area is littered with ash from the local power station but it doesnt look anything the same..... the area where the pieces were found was behind some small terraced houses that would of originally been a farming area.....
On another forum a suggestion of petrified timber .... but a google search didnt show anything similar.
A trip to the museum might have to be in order.
No - petrified timber is different, and it does not explain the smeared coating or magnetism.
Let us know how it goes.