It does not very much look like pyrite in OPs picture. The rock does not look very much like ore and with pyrite you’d often still see some crystals, which look like small golden cubes.

For clarification: Most of what you listed, are minerals. Rocks (like schist) are usually composed of different minerals.

Best guess I can make is, that your rock is some kind of schist and contains quite a lot mica. From your picture it does not look very much like pyrite.

The glitter from your rock, especially if it looks like small sheet like flakes is very likely the mica or some other sheet silicate.

That it breaks down quite easily may be a sign of weathering.

Land of the free (speech)

Probably not those people

At least here people less often get shot.

As a German it is seven times easier to piss of a Brazilian

Hier wird wohl kräftig am Watschenbaum geschüttelt!

That’s a bad omen for TEVI

It’s weird how explosions often take place where craters are