What is this rock/ore?

[Rail Dawg]

Metal detector got a hit on this rock/ore from Northern Nevada.

It has dozens of visible dark golden brown crystals in it.

I don't know what it is.

The area is known for gold and cinnabar (mercury).

Thoughts?

 

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[goldog]

Looks like magnetite or something similar. Other minerals like pyrite are also present. IMO.

 

[Bejay]

The shape of the crystals will tell the story!

Bejay

 

[Rail Dawg]

Thanks guys.

If you enlarge the picture the crystals are right there.

 

[Bejay]

I enlarged and to my eye they look cubic. Iron Pyrite (FeS2...iron/sulfur ) and Galena (Pb..lead) have cubic crystals. Galena...lead will make a detector sound off. Pyrite will not....if my field work with a detector is correct on pyrite.

Bejay

 

[Rail Dawg]

I enlarged and to my eye they look cubic. Iron Pyrite (FeS2...iron/sulfur ) and Galena (Pb..lead) have cubic crystals. Galena...lead will make a detector sound off. Pyrite will not....if my field work with a detector is correct on pyrite.

Bejay

Thanks BJ.

It’s a cool piece of ore.

Appreciate the help.