Originally posted by william_es:

Originally posted by Mr B.:

The giants are as confusing as hell. Black marble from the bones? Eh, what? And that's nothing different to mining, it's just different materials.

It's petrified bone. Like petrified wood. Stone has slowly replaced the organic parts, until it's entirely stone. What's confusing about that process?

Because marble is stone. Not bone. And it would look like marble, rather old bone then suddenly turning into....black marble...