magnetic rock

[wyrnut]

I have a couple blackish dark gray rocks that are magnetic , meaning they stick to a magnet . there about the size and shape of regular 1 inch rock that you would use for fill before you put down concrete or like a gravel drive way except their dark in color. help me with any info as to what these are. did I find something valuable or is this common? thanx for any words of wisdom.

 

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[wyrnut]

I'd like to add that there not super magnetic like a peice of steel but if you touch the magnet to them they will hold on.

 

[wyrnut]

any one?

 

[TerryC]

Magnetite. Very common rock. Makes up very much of the black sand found while panning for gold. I had a detectorist bring one to me while gold hunting. A quartz rock with a vien. He thought he had gold. I put a magnet to the rock and burst his bubble. The rock stuck to the magnet, indicating the vien was magnetite. Very common "hot rock". Sorry. TTC

 

[wyrnut]

thanx terry