Obsidian is a form of glass. Glass can only form when material cools from a molten state.
Obsidian is an igneous rock.
Obsidian is an igneous rock.So the answer is YES.
Obsidian is in the Igneous rock group.
Obsidian is an extrusive felsic igneous rock.
It is an igneous rock
obsidian obsidian
Obsidian is in the Igneous rock group.
Granite is a coarse grained igneous rock without Pyroxene.
obsidian rock
obsidian
obsidian
It is obsidian.