Why does this brick react to my metal detector

[digger460]

There wasn't a brick section, so I figured I'd try here. Hunting an old homestead, and found this with my MD. I pretty sure it's a brick, but don't understand why the inside looks like petrified wood, and it reacts to the MD.

Anybody have any answers? Thanks

 

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[worldtalker]

You mean why does your MD react to the rock...Hot Rock.

GOD Bless

Chris

 

[spudwinkle]

Iron oxide wold be my guess.

 

[digger460]

You mean why does your MD react to the rock...Hot Rock.

GOD Bless

Chris

So is it a rock or brick? has 1, 90 degree edge. Thanks

 

[Treasure_Hunter]

So is it a rock or brick? has 1, 90 degree edge. Thanks

Most likely has iron oxide in it...Tiny pieces of natural iron

 

[DDancer]

Not a brick, natural. Probably a slate with, as said by others, high iron content. Also said, a Hot Rock. It may have been where you hunted because the previous occupants thought it looked neat to and dragged it back home with them.