Board Thread:Off Topic/@comment-24993958-20151118083252/@comment-23702983-20151120051442

Incorrect. Obsidian is silicon dioxide. 60% or more. If it's mostly something else, it's a different mineral with small components of obsidian mixed in. Therefore, a composite, and NOT obsidian. That's like saying gold and silver mixed together is "still true gold". It isn't. It's a mixture of gold and silver. And I highly doubt they took all this into consideration when giving Cinder her powers. It's more likely that it isn't obsidian at all, because there is no bright, clear, transparent form of obsidian. If they were to give her the powers of obsidian, it would probably be black, which is what people first think of when they think "obsidian".