Obsidian volcanic glass formed by quenching of magma. It is typically black, smooth and has a glassy to vitreous luster.
Obsidian has a higher luster(shinier) than coal, coal is organic, and coal is sedimentary and obsidian is igneous
Obsidian is a naturally occurring volcanic form of glass.
obsidian doesnt crystalize because it was formed under water.
Obsidian is an igneous rock.
Rock Luster is the streak a rock makes.
Obsidian is in the Igneous rock group.
how can a blue obsidian rock be blue
No. Obsidian is volcanic glass. Glass is amorphous and thus noncrystalline.
No. Obsidian is just one of many types of volcanic rock.
Volcanic rock.
Obsidian is an extrusive felsic igneous rock.