Board Thread:News and Announcements/@comment-67.140.221.67-20160930231239/@comment-67.140.218.123-20161002164834

Even though they haven't said anything, hasn't the show itself basically proven orange dust is lava? The stuff Cinder shoots at Glynda in episode 1 behaves like lava, and Cinder makes obsidian with it. That's pretty cut and dry.