Question about a rock I found.

[millionaireh2o]

Hey guys, this is my first post. I just bought my first metal detector a couple of days ago.. I have dug up my yard and some areas around my house. Anyway I was doing some digging at Lake Michigan and I got a huge Ping from this rock. I would like to know if anyone knows what type of rocks would ping? It is a dark almost black color on the outside, but when I broke a peice off it has a silvery color to it. It is lighter then most rocks. I had someone look at it and they seem to think it might be meteorite. Would the metal detector pick up meteorite? Also does anyone know a way to find out for sure. Thanks everyone for there advice. I will post up my finds over the last couple of days soon.

 

[hobbes_lives]

This may help...

http://www.meteorites.wustl.edu/meteorwrongs/meteorwrongs.htm

The fact that it's light for its size sounds like an issue. You may want to contact a local university and have them look at it to be sure.

 

[Elton]

It could be a coke rock and what we all call hot rocks.They will set off a good solid signal..We have them on the lake here.

 

[John 'n' W.Va]

It sounds like coke, which is as charcoal is to wood, coke is to coal. I live with it here in WV. There is so much of it they should make it the state stone. It always hits on dime to quarter on my detector.

 

[wedjlok]

I also find a lot of these here in Florida. Sometimes when you wet them they seem to act like gray chalk and such. I have found that in my cases, I usually put them through an electrolysis treatment and the gray/silver rock matter will break up and they almost always have metal inside of them. Around here it seems that they are more common to have aluminum or pieces of welding material and such in them more than anything else.

For years I was wondering why I was getting these strange rocks that acted like hot rocks or coke form coal, but now I find that they almost always contain metal in them, due to the immense sandbar that Florida is.

Just my two cents worth.
Aeryck