North of the border

[Wishbone]

As far as it's location, BC Canada. I found it in a creek, behind a bigger rock. I kept it because of the staining (what is that?). I tried to show all angles. It looked like a line, vein or crack on one side of it. When I hit the rock with a hammer (about medium force), it split along the line. You can't see it in the pic, but there is microscopic shiny little silvery things, on the outside and inside of it.
What story does it tell (if any)?
Thanks for you help!

 

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[Bajahunter]

It looks to be a piece of very old granite.
The stain is just that, a stain from minerals in the creek.
The silver sparkles are most likely mica or some other form of muscovite.

 

[Wishbone]

Thanks bajahunter. I've heard of mica before, but didn't know they were called "muscovites". Does mica have anything to do with gold, or is it all over the place?
Take care.

 

[Greenwood Charlie]

I think its diorite . The difference between diorite and granite is granite will have feldspar, which is a pink mineral, so its black white and pink. Diorite is just black and white.

 

[Eu_citzen]

Feldspar can vary in colour. I agree with Granite.