I found a rock and need help?

Question

i found this rock that i found in the nantahalla river while tubing. its circular shaped and when i rub it on paper little shiny grains come off. the rock itself is a shiny metalic. anyone have any ideas?

just tell if you need more info

Answer 1

There are a LOT of different information taht goes into identifying a specimen.  A picture might help.  The fact its circular and rounded, just means its been in the water a while.  If you put ANY stone in the water or sand for long periods of time, it will eventrally become circular/rounded/smooth.  A picture might help some.  And also, where the devil is Nantahalla river? That would help too.

Answer 2

If not mica schist (are you sure?), then it could be graphite (unlikely if there is no streak on paper) or hematite.  For the latter, rub on a tile.  Hematite will leave a rusty red streak.

Answer 3

Sounds like a mica schist, a metamorphic rock,. The shiny grains are the mica flakes.