well i guess it would be black and hard like all other rock that come from volcanoes but remember the volcano is in Iceland.
Sediments are produced
Igneous rock.
Stratovolcano
Stratovolcano
Extrusive igneous rock.
Sediments are produced
Sedimentary
Marble
The eruption, by some estimates, produced about 140 million cubic meters or ash.
The rock that is formed is an igneous rock. It's formed when the magma aka lava cools down it turns into a rock which is an igneous rock.
Extrusive igneous rock is produced by the solidification of lava.
Porcelain is not a type of sedimentary rock, but it is a man-made material produced from the heating of certain minerals.