shiny black. if it is cut thin enough, it looks like gray glass because you can see through it.
Obsidian is an igneous rock.
Obsidian is in the Igneous rock group.
No. Obsidian is volcanic glass. Glass is amorphous and thus noncrystalline.
Obsidian is an extrusive felsic igneous rock.
No. Obsidian is just one of many types of volcanic rock.
Volcanic rock.
The common name for obsidian rock is volcanic glass.
obsidian obsidian
Obsidian is an igneous rock.So the answer is YES.
obsidian
Obsidian is in the Igneous rock group.
It is an igneous rock