Igneous rocks, which are volcanic rock are often Used as building materials for such things as kitchen counter tops and tombstones, or even just material to construct buildings.
I think there are more than two uses of volcanic rock. There are two FORMS of volcanic rock. One is pumice and the other is obsidian. Pumice is often used for landscaping, personal beauty uses (callus removal), etc. The other is obsidian. Obsidian is like glass and ancient people's used it for tools. Knives, arrowheads, and other tools that one would want to have a sharp edge are perfect uses of obsidian. In modern times, obsidian is used for jewelry, art, and even some modern day surgical tools. Check out geology.com if you have more questions about rocks...
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No. Volcanic rock is not flammable.
Iron and magnesium are the two common minerals in basalt. The rock is poor in silica though.
Volcanic islands are formed by volcanoes and are therefore composed of volcanic rock.
Molten rock, volcanic ash and gas
Niether. Volcanic rock is a mixture.
Kimberlite is a volcanic rock. Kenyte is a volcanic rock found on Mount Kenya.
Yes, pumice is a volcanic rock that is formed from the solidification of frothy volcanic lava. It is known for its porous and lightweight nature, making it float on water.
Volcanic rock forms by lava that has come from a volcano, cools and solidifies to form the rock.
A slab of volcanic rock is called a "lava flow" or a "lava rock".
Volcanic rocks are considered igneous.