what is this rock?

A brittle rock made of glitter. It breaks in this linear fashion and can be pound into sand by a mortar and pestle.

Anyone got any clues?

Edit: Thanks for all the answers. I found it in Romania and after searching for forums of minerals from Romania, I got a few other clues.

It isn't conclusive to me yet, but the possibilities are:

Of these, Mica and Sylvanit fit the best (imo).

11 comments

Not a rock, that's a mineral. Jesus, Marie…!
https://xkcd.com/3068/
- a better way to do it is post something like "look what a cool bauxit i found" and then just wait for them to angrily correct you 😄
  
  the linux support strategy i see
"Rock"
- Glassk
  
  "Meh-tuhl"
I'm not all that great at identification, despite having a sizeable rock collection myself, but I feel pretty confident in saying that you've got a type of mica schist. Schists often are primarily composed of mica.
Could be Mica https://en.wikipedia.org/wiki/Mica
As a kid, I got told that's pyrite, but I'm not sure how correct that is. Most images show the crystalline structure rather than brittle stone, but I was able to find this picture on Wikpedia:
It might be a schist?

11 comments