The common name for obsidian rock is volcanic glass.
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)
It is obsidian.
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 an extrusive felsic igneous rock.
Type in "buy obsidian" in your search bar. You will be given information on several sources. Knappable obsidian sells for around $5 US per pound.
The common name for obsidian rock is volcanic glass.
Obsidian is an extrusive rock and is formed from rapidly cooling magma. Obsidian is also known as volcanic glass and one can find only sub-microscopic crystals in it. This is because it was cooled too fastly for large crystals to form. If the material that obsidian consists of were an intrusive rock and had a lot of time to cool down, one would find that it would be composed of easily visible crystals.
obsidian obsidian
obsidian