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Volcanic glass or obsidian.
Wiki User
∙ 14y ago
Wiki User
∙ 12y agoobsidion
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A smooth glassy black igneous rock?
Yes. Obsidian is shiny on unweathered fracture surfaces. It is also an extrusive rock that is felsic, and can be worked to nearly molecular thinness at the edges.
What igneous rock has no visible crystals?
Granite is a coarse grained igneous rock without Pyroxene.
How you can tell an igneous rock from a sedimentary rock from a metamorphic rock?
Igneous Rocks are usually black and smooth because they ate formed by heat, sedimentary rocks are usually layered in color.
What is an extrusive igneous rock that is actually glass?
One type of glassy igneous rock is obsidian, which is black and glass-like. Any type of igneous rock that is glassy would be a extrusive rock, which means it was formed outside the earths crust and cooled quickly, making for a fine grain and small crystals. hope this helps
What is pumice feel like?
Pumice, an igneous rock, is generally white to dark gray.
What rock is black glassy and was formed by rapidly cooling lava?
The answer is pitchstone. it is and igneous rock.
What is the luster of igneous rock?
i think that igneous and metamorphic rocks uses luster because maybe they have it in them
What is the name of a smooth glassy black ingeous rock?
Obsidian
A smooth glassy black igneous rock?
Yes. Obsidian is shiny on unweathered fracture surfaces. It is also an extrusive rock that is felsic, and can be worked to nearly molecular thinness at the edges.
What is the texture of Intrusive igneous rocks?
An igneous rock has two different textures. Extrusive rocks generally are smooth and glassy. Intrusive rocks are generally coarse
How do Igneous rock with glassy textures?
An igneous rock with a glassy texture cooled from its' liquid state very quickly, an example of this would be obsidian, a volcanic glass.
A smooth glassy black igneos rock?
It is obsidian. Obsidian was mostly used as an arrowhead for hunting.
Why does pumice have a lower density than other igneous rocks?
It is a glassy igneous rock, so there are holes in it. The holes make the rock less dense than other igneous rocks that are Not glassy.
How can you decide if a rock is sedimentary igneous or metamorphic?
igneous is black and smooth metamorphic is magnetic and sedimentary is used as cement
What are characteristics of basaltic igneous rock?
mainly glassy with amygdules and glass
What igneous rock has no visible crystals?
Granite is a coarse grained igneous rock without Pyroxene.
Which igneous rocks would be formed by the fastest cooling of lava?
Glassy textured extrusive igneous rock, such as obsidian.
