Obsidian is in the Igneous rock group.
A schist rock belongs in the metamorphic rock group.
Obsidian is in the Igneous rock group.
the answer to the is sedementary
Diamond belong to the Igneous rock group!!
It is a sedimentary rock.
Igneous
Slate is a low-grade metamorphic rock.
I believe it belongs to the group Halides.
Sedimentary Rocks because chalk is pretty much limestone.
Metaconglomerate is a "metamorphic" rock whose parent rock type was a sedimentary rock.
Pumice is volcanic or igneous.