Found this.

[Loosecanon]

First time out with the 705 I found this among many coins and a silver ring. It is non magnetic but the Pro Pointer and the 705 went nuts, it was about 4 inches down. I scratched a corner of it and it has silver material inside.

http://photos.smugmug.com/photos/i-5c3dzHc/0/XL/i-5c3dzHc-XL.jpg

http://photos.smugmug.com/photos/i-HFmCHmM/0/XL/i-HFmCHmM-XL.jpg

 

[Ism]

It looks like something I would put in the round file.

 

[GoGoGopher]

flattened lead slag?


HH,

 

[1859large]

What you have there is a cryptic, flat rhombohedral shaped object of unknow origin and made of a white metal. could be zinc, lead, or other white metal unlikely to be aluminum and definately not mercury, which would be a liquid.

You got me.

A true whatzit.

These are the things that make metal detecting great, you never know what you might find and sometimes never know what you do find!

HH 1859

 

[Aarong81]

Nailed it! Definitely not liquid. lol

 

[edjcox]

How about slicing it in half with a diamond blade and photo's of the cut... You might have a ......

 

[hotrodzincoln]

Can you score it easily with a sharp object? That would indicate lead. From this photo, the veneer looks reddish. If it were more black I would think silver. Try rubbing a corner with steel wool and silver polish and see if it takes a nice shine. All of the zinc that I've found is whitish gray and often brittle. If the color in the photo is accurate, the reddish coating would lead me to believe its iron oxidization. It might be a piece of hardened steel alloy.