Board Thread:Off Topic/@comment-24993958-20151118083252/@comment-25396609-20151120045534

Evravon wrote: Obsidian is black. If the black is mixed with other colors it's because the obsidian merged with other minerals (not obsidian). It's composed of mostly silicon dioxide. If it isn't mostly black, it isn't true obsidian, it's a composite of other minerals with small amounts of obsidian mixed in. It is true obsidian, impure, but still true obsidian. The primary components are the same as that of ordinary glass, meaning the components in it can be used to make clear glass, or other colors of glass, under the correct conditions.