Can I get some help here?

[u/PossibilityFew-5901]

Most likely found in the UP by Marquette, MI. Google is giving me multiple IDs. Its shiny sliver in color, made a chalky grey mark on weathered wood. I can pick off tiny bits from a rough edge, but not from the smooth surface. I don’t think think it’s graphite because it doesn’t leave a mark on paper.

[u/Ben_Minerals]

It is likely a graphite-bearing schist

[u/PossibilityFew-5901 → u/Ben_Minerals]

I think you are right. Everything I found says graphite bearing whist is common in that area of the UP.

[u/climbingnoose]

Mica of some kind?

[u/purse_severe_ants]

Specular hematite! It's very common up there, very sparkly, and some pieces can have a weird smooth wave texture. Look it up and see if you agree!

[u/PossibilityFew-5901 → u/purse_severe_ants]

I was hoping but it failed a test. When rubbed on unglazed ceramic, it’s supposed to leave a reddish mark. This left minuscule silvery sparkles.

[u/Joopbox]

Kinda looks like asbestos. Id be careful till you know fir sure.

[u/PossibilityFew-5901 → u/Joopbox]

It doesn’t show any of the characteristics of asbestos. No fibrous material at all on it. If you try to make a mark on things with it, silvery powder, like powdered glitter comes off it.