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obsidian
The answer is pitchstone. it is and igneous rock.
No. For example, coal is a black sedimentary rock.
The common usage of "lava rock" in the USA refers to a black rock with a number of visible bubbles or air pockets that is formed from cooled lava on the surface. Although lava rock is an igneous rock, it is not the same as the definition for the word igneous, which can also include igneous rocks which have solidified from magma below the surface.
Basalt.
hard rock black rock lava by smartman this is true
The black rock, in most cases, is basalt, a volcanic lava that was left in the desert by ancient eruptions in these desert area.
Lava is a molten rock from a volcano, and is rock.
Lava does not burn rock because rock is not flammable.
Lava is molten rock on earth's surface.
Obsidian is a beautiful rock. It's description is pretty simple, it is a rock that formed out of cooled lava, and is black in color.