Obsidian is an igneous rock. However it differs from other rocks because it contains no minerals. It consists of natural glass, which is not a mineral because it has no crystal structure.
Answers from McDougal Littell, Earth Science book
Obsidian is classified as igneous rock, solidified from molten material.
An obsidian rock is an extrusive igneous rock that forms when a volcano erupts and has no time to crystallize, so it has a glassy texture. Obsidian rocks are generally black in color.
most obsidians have a felsic chemistry. Felsic igneous rocks are light-colored
Obsidian is an extrusive felsic volcanic glass.
Extrusive igneous rock such as basalt, rhyolite, pumice, and obsidian.
obsidian rock
It is obsidian.
Igneous rock is a particularly durable kind of rock; a statue made from igneous rock can last a very long time, and will have great ability to withstand whatever stress it is exposed to.
Igneous rock.(obsidian)
It is an igneous rock
Obsidian is an igneous rock.
obsidian
Obsidian is an igneous rock.So the answer is YES.
Granite is a coarse grained igneous rock without Pyroxene.
Obsidian is in the Igneous rock group.
Obsidian is an extrusive felsic igneous rock.
Extrusive igneous rock such as basalt, rhyolite, pumice, and obsidian.
obsidian obsidian
Obsidian is in the Igneous rock group.
obsidian rock
Obsidian is a volcanic or igneous rock. It is formed when lava dries up.