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Most rocks do but there are some exceptions.
Coal (such as bituminous coal) is composed of organic material but is considered a sedimentary rock.
Glassy rocks such as obsidian or pumice cool too quickly to contain crystals.
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∙ 14y ago
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∙ 12y agorocks are made out of poo, wee, spongebob and patrick and guts and more spongebob
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∙ 10y agoNo. All rocks don't contain crystals, but I do know that they all contain crystals. I know because I'm doing Chemistry homework right now, and that it one of the questions. Hope this helps :)
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∙ 10y agoSort of. Most rocks are composed of minerals, which have a crystal structure.
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∙ 12y agoYes. Minerals are defined as naturally occurring solids, formed by inorganic processes, with a characteristic crystal structure, and a specific chemical composition.
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∙ 11y agoNo. A single crystal is not considered a rock. Synthetic crystals and crystals composed of organic substances (such as sugar) are not minerals.
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∙ 7y agoNo, most stones are composed of a mixture of minerals and crystals. Crystal minerals are fairly rare actually, which is why people like them so much.
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∙ 10y agoBoth. Rocks are made of minerals.
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If the lava cools quickly the crystal are what?
If lava cools quickly, the minerals don't have as much time to form crystals, so the crystals do not become very large. Igneous rocks that cooled quickly and have small crystals are described as "aphanitic" igneous rocks.
What are some things that can be found on the earth's surface?
bones,dirt,rocks,water,diamonds,crystals,trees, lots more but i can't say them all.
What do crystals form from?
Many different substance can form crystals. Crystals form when the atoms, molecules, or ions of a substance settle into a definite, repeating pattern due to the manner in which the chemical bonds are arranged. Common crystalline substances we encounter include sugar, salt, ice, and borax. With the exception of volcanic glass, all rocks are composed of minerals which, by deifnition, are crystalline. Common components of these rocks include silica and various metal oxides.
Rocks that contain crystals that are roughly equal in size and can be identified with the unaided eye are said to exhibit a texture.?
Coarse grained.
What is true for all rocks?
They all slowly absorb CO2 from the atmosphere
Do all intrusive igneous rocks have crystals?
Yes. All intrusive igneours rocks and many extrusive rocks have crystals.
Do rocks have crystals?
Some rocks may contain crystals, but not all rocks contain crystals. Crystals can be found in rocks that have volcanic origin.
Do igneous rocks have crystals in them?
Not all of them. Volcanic glass does not have crystals.
No. Not all rocks have crystals. Only the ones that are sparkely and with round bumps.?
No that doesnt matter all rocks are rocks !
Name some rocks which have crystals?
All rocks have crystals, or at least crystalline structures. Sedimentary rocks may not have crystals as such, but the individual grains have internal crystal structures. All magmatic and metamorphic rocks have crystals, though they may be too small to be seen without the aid of a microscope. Only possible exception is Obsidian (volcanic glass) which may be amorphous.
Do extrusive rocks cool quickly?
Extrusive rocks do cool quickly because either the crystals in the rock are very small or there are no crystals at all.
Is it true that intrusive rocks have similar crystals than extrusive rocks?
no. Extrusive rocks are usually have bigger crystals and a rougher texture, unless you notice obsidian and another type of extrusive rock don't have crystals, at all
Why do some rocks have crystal?
it all depends on the rate of cooling and crystallisation and the type of rock
Rocks that contain crystals exhibit what texture?
What rocks contain 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.
Rocks that have crystals?
Igneous rocks
