User blog comment:VedranTheII/Pretentious Diaries 2: What tricks would you teach your Aura?/@comment-26512661-20150718155058/@comment-4010415-20150719002026

1. Ruby is a self-admitted weaponry dork. So, as stated above, if glass weapons are possible, of course Ruby would have reason to say it's glass.

2. I agree with all the stuff about Cinder using her Aura to strenthen the obsidian swords so they won't break. I mean, really, if Blake and Pyrrha can swing around bread without it breaking, and if Pyrrha said that weapons are conduits for Aura, then it's entirely possible that they can use their Aura to strengthen the integrity of their weapons.