Two strange metal detecting finds

[timekiller]

I found a black chunk of material that sets the metal detector off and is extremely light weight. Muritic acid doesn't affect it at all. It is pitted. I have no idea what this could be. Also, I found a grayish color metal that has a very heavy weight property and is harder than lead. Muritic acid doesn't affect this metal either. Any ideas or suggestions.

 

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[Montana Jim]

It looks like some kind of graphite... I dunno.

 

[fortbball9]

The top rock looks like a hot rock that we find around railroad tracks,but that is my guess.

fortbball9

 

[timekiller]

I appreciate your reply! And I can see where on this picture it looks like graphite, but I have a piece of graphite out of a battery cell and the large chunk item I found with the metal detector is extremely hard and brittle. Also, it will not mark paper. I'm not convinced that it is graphite. Any other ideas?

 

[timekiller]

The top rock looks like a hot rock that we find around railroad tracks,but that is my guess.

fortbball9

It was found on the river bank around an old landing close to where an old homesite from the late 1700's to early 1800's. As far as I know, there were no railroad tracks anywhere near by. I know that doesn't mean that it couldn't be that and I haven't thought of that. Thanks!

 

[chipveres]

The top piece looks like pumice, but I can't think of any reason for it to set off a metal detector. Are there volcanoes nearby?

Chip V.

 

[Bigcypresshunter]

The top piece looks like pumice, but I can't think of any reason for it to set off a metal detector. Are there volcanoes nearby?

Chip V.

Maybe something inside? Just a guess.

 

[dozer dan]

looks like a clinker from coal ashes. from coal fired: steam boat, furnace, smelter,
blacksmith, train, ect.

 

[Monty]

Looks a lot like slag from the local smelter. They use it to build up roadbeds and etc. around here. Monty

 

[alabamajoe]

Not sure about the bottom pics but the top lightweight pic is burnt coal (coke) or also known as a hot rock.
A "hot rock" is a stone or burned coal (coke) which contains
a high concentration of iron ore. A hot rock will usually give
a good, solid signal in the motion (GEG/DISC) mode of operation.
Found some of this myself.

 

[spawn00x]

meteorite maybe?

 

[AKiwi]

Alabamajoe.... has got the top pic.
We burnt this stuff in old coal fires or stoves.
It is the result of coal having being heated to give off its gas for other means.
Cheers

 

[dozer dan]

looks like a clinker from coal ashes. from coal fired: steam boat, furnace, smelter,
blacksmith, train, ect.

a.k.a. clinker.

 

[Bigcypresshunter]

I didnt know that coal could set off a metal detector.

 

[Mich. Wolverine]

B.C. Hunter. I have found alot of unburnt coal metal detecting and it's usually a good signal. I don't understand why but it's a real pain in the rump. It don't happen very much with my 1266 unless it's a big chunk, but with my Garrett 500 it was pretty common. Anybody else have this problem?

Wolverine.

 

[Bigcypresshunter]

B.C. Hunter. I have found alot of unburnt coal metal detecting and it's usually a good signal. I don't understand why but it's a real pain in the rump. It don't happen very much with my 1266 unless it's a big chunk, but with my Garrett 500 it was pretty common. Anybody else have this problem?

Wolverine.

We dont have coal here in Florida but I remember lots of it in Pittsburgh. I always thought of coal as organic but I dont really know. We also had a lot of coke which is a byproduct of coal, I think, and was used to make steel.

 

[UncleVinnys]

That's what we call coprolite - - fossilized dinosaur doo-doo.
Although I'm not too sure about the dinosaur part.
OR the fossilized part either, for that matter. . .





(joke!)

 

[mcmich]

I was finding alot of what appears to be the same material as in your top picture. This was in a local river. It is a fast moving river so the pieces were worn down and rounded (like natural river rocks). Had me stumped to until I found a similar chunk of the stuff at an old house. It was shaped like a big thick bowl, ie, man made. Still not sure what the heck it is but it made the metal detector scream.

 

[jivey1ark]

coal will set off detectors. we live in an area where coal mining was the main form of living. Our house sits over an extensive web of shafts. I have just about quit detecting on our property because of all the small pieces of coal that set my md off. all that digging for a dime size chunk of coal is for the birds. lol

 

[Sky Pilot]

Same in East Tn, also! Coal, burnt or not will send a lot of detectors off the deep end! Rarely, if one G.B's their detector on the coal "bed", recovery of targets under and mixed with the coal is possible, however, this is the exception, not the rule! Good luck and great hunting! Great find, hope you discover what it is you have found! Regards, Richard.