Board Thread:Suggestions forum/@comment-27372820-20170105183041/@comment-99.21.148.172-20170113005333

Well, obsidian is volcanic glass, made when the molten rock cools super fast when it's moving through the air. There are volcanos to the north which may have erupted and thrown volcanic rock and glass down south. Also probably in the deep past when Melkor was rendning Arda and running amok, it wouldn't surprise me if there were once ancient volcanos in that jungle region. (Far Harad is basically on the equator of Arda as well, but even so).