0
Any igneous rock, if ground down to a smooth face and polished, will be smooth. Any igneous rock, if cut, will display a jagged edge. There is the potential for any igneous rock to be smooth or rough.
A pumice may be an exception, but pumice isn't all igneous rocks. Most igneous rocks are not vesicular. Pumice will always be rough.
Obsidian is naturally smooth, though not perfect. It has conchoidal fracture, so it may show a smooth face, but this is not always the case.
Any rock that has been tossed in a river or on a beach for a few thousand years will be pretty smooth, no matter what it is (except pumice). A rock fresh from the quarry will nearly always be jagged and rough.
Due to the crystalline texture of igneous rocks, most will naturally fracture in a way that leaves a rough face, if that is what you meant.
What else can I help you with?
What are andesite rocks?
Andesite rocks are Igneous rocks. They are jagged and rough, and come from cooled magma.
Are igneous rocks smooth?
They may be smooth and others may be rough. Smoothness/roughness is not a defining characteristic for igneous rocks.
What are some common textures in igneous rocks?
hard rough and not smooth
What kind of volcano has igneous rocks?
All volcanoes produce igneous rocks.
Is a Lava Rock a Igneous Rock?
Yes!! All hot rocks are igneous rocks.
When molten rocks cools what rocks form?
igneous rocks
What types of rocks are basalt and granite?
They are all igneous rocks.
What kind of rocks can produce metamorphic rocks?
All sedimentary and igneous rocks
Are volcanic rocks sedimentary?
No. Volcanic rocks are igneous (although not all igneous rocks are volcanic). Sedimentary rocks are made of sediment naturally cemented together. However, volcanic (or extrusive igneous) rocks can be eroded into sediment, which can be cemented, compacted, or otherwise become sedimentary rock such as sandstone or conglomerate. It is then not considered igneous.
What is the name of all three rocks sedimentary igneous and?
Sedimentary, igneous and metamorphic.
What are igneous rocks that form over the surface?
Rhyolititcen rocks.
What do you call rocks that have been formed from the hot molten material within the earth's crust that has cooled and hardened?
Igneous rocks are formed by the solidification of molten materials.
