Comment by pjungwir

Something I've been curious about lately is: why do we find elements on Earth clumped together, for example veins of iron or gold? I can understand coal or oil since that comes from something organic that put it there. But what about elemental substances? When I throw stuff into my blender or spice mixer it gets pretty homogeneous. Surely an exploding star ought to mix things up better than that. So is there something that brings the iron & gold back together again? I don't know if this is a question for an astrophysicist, chemist, or geologist, but I suppose HN has all three. :-)