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Yes, they can. Extrusive igneous rocks, which form outside the Earth's surface, often contain small or no crystals, because they cool quickly and the particles in the lava do not have much time to arrange themselves. Intrusive rocks, which form inside the Earth, generally have large crystals because they cool slowly. Granite is an example of an igneous rock with large crystals.
Wiki User
∙ 12y ago
Wiki User
∙ 11y agoit depends on how quickly the rock cooled if it cooled quick there will have small crystals if it cooled slowly it will have large crystals
Wiki User
∙ 13y agoNo, they do not have bands of crystals but they are all crystalline.
Wiki User
∙ 13y agoYes, igneous rocks may have inter-grown mineral crystals. The slower the rock cools, the larger the crystals.
Wiki User
∙ 13y agoSure. They are made of crystals.
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∙ 13y agoyes
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Do igneous rocks have small crystals large crystals or no crystals?
It depends on the type of igneous rock. Intrusive igneous rocks such as granite have large crystals, extrusive igneous rocks may have small crystals as in basalt or no crystals as in pumice.
What are Igneous rocks that have large crystals and small crystals?
Such rocks are called porphyritic.
What do the large crystals in igneous rocks tell about the rock?
That it cooled very slowly.
Rocks that have crystals?
Igneous rocks
Intrusive Igneous rocks are characterized by a coarse-grained texture because they contain?
Intrusive igneous rocks commonly have large mineral crystals.
Do igneous rocks have small crystals large crystals or no crystals?
It depends on the type of igneous rock. Intrusive igneous rocks such as granite have large crystals, extrusive igneous rocks may have small crystals as in basalt or no crystals as in pumice.
What are Igneous rocks that have large crystals and small crystals?
Such rocks are called porphyritic.
What condition lead of the formation of large crystals in an igneous?
Igneous rocks will develop large crystals is they cool slowly underground.
Igneous rocks with large crystals?
quartz
What conditions lead to the formation of large crystals in an igneous rock?
Igneous rocks will develop large crystals is they cool slowly underground.
What conditions lead to formation of large crystals in an igneous rock?
Igneous rocks will develop large crystals is they cool slowly underground.
Do intrusive rocks have large crystals because they cool quickly?
No. Intrusive igneous rocks have large crystals because they cool slowly.
Are igneous rocks formed from smalll minerals?
Not necessarily. Intrusive igneous rocks, especially pegmatites, can have large crystals.
What is the texture of igneous rocks with large crystals that slow cooling produces?
Phaneritic.
What do the large crystals in igneous rocks tell about the rock?
That it cooled very slowly.
Rocks that have crystals?
Igneous rocks
Intrusive Igneous rocks are characterized by a coarse-grained texture because they contain?
Intrusive igneous rocks commonly have large mineral crystals.
