Volcanic glass, or pumice (vesicular obsidian).
Obsidian
Obsidian
obsidian rock
No, obsidian rock does not float as it is a dense and heavy igneous rock formed from cooled lava. Its high density causes it to sink in water.
Igneous rock.(obsidian)
obsidian
its used to make tools and jewlery
Obsidian is an extrusive igneous rock. Volcanic in origin, it is very common in recent lava flows. Obsidian is primarily made of glass. Obsidian is amorphous, lacking any crystal structure found in gemstones. For more details, try asking the question - "What is obsidian"
Obsidian, basalt, andesite, pumice.
Obsidian
Obsidian is an igneous rock.
Obsidian is in the Igneous rock group.
No. Obsidian is volcanic glass. Glass is amorphous and thus noncrystalline.
Volcanic rock.
No. Obsidian is just one of many types of volcanic rock.
obsidian is one of them
Obsidian is an extrusive felsic igneous rock.