Obsidian is an extrusive felsic igneous rock.
Obsidian
Granite is a rock, whereas obsidian is a type of glass formed by cooling lava.
Obsidian
obsidian
obsidian? i think?
Obsidian is an extremely sharp type of glass, so it is often used to make knives and scalpels.
Obsidian is an igneous rock.
No, obsidian is a type of volcanic glass that is denser than water, so it will sink when placed in water.
Obsidian is in the Igneous rock group.
They are both Igneous. I hope this answered your question.!
Obsidian
obsidian