What is it? I have no idea. It's some kind of silicon stone(i think), but other than that I have no clue! My brother brought it back for me from Italy, claiming it came from Mount Vesuvius. Did it?
Why is it cool? Look how freakin' sparkly it is! I mean, uh, it's aesthetic properties are quite pleasing. And if it did come from Mt. Vesuvius, then that's awesome. But if it isn't, that's still cool.
Where can I get one? I have no idea. I've seen stones like this one around, in museum shops where minerals are exhibited, but i can't for the life of me remember what they are called! Does anybody know?