There are infinitely many ways to live a nice life and infinitely many ways to suffer. Every possibility happens and is equally real and important. If you save one universe from a horrible doom, there are always more that will suffer an even worse fate.
The multiverse is truly vast place, so anything you do or don’t do is less than a drop in the ocean. What matters is how your decisions and interactions affect you.
That's a pretty good guess, but it also has grains of sand in it. I expected slag to be more uniform.
Anyway, the red and orange colors could still be connected with some iron compounds. If it is slag, then it was somehow mixed with regular sand. That could still happen if you pour molten slag on a new dump area. The later batches will be poured on older slag, so they don't really get to mix with anything.