0
What causes minerals to form large and small crystals within the same rock?
Wiki User
∙ 13y ago
Recrystallization. Recrystallization is a process whereby small crystals of one mineral will slowly convert to fewer, larger crystals of the same mineral, without melting of the rock.
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
Does melted rock that cools quickly result in igneous rock with large mineral crystals?
No, melted rock that cools quickly result in igneous rock with large minerals because large crystals take time to form and the rocks that usually have them are the ones that were formed inside the earth.
Are large crystals found in diorite?
diorite crystals are large and andesite crystals are small
Why do Minerals in geodes form spectacular euhedral crystals?
Because they can take long to form resulting in a large crystal well-formed. And also remeber fast forming Crystal =small, slow forming Crystal =large
What are porphyroblasts and how do they form?
A Porphyroblast is a large crystal formed on the inside of Metamorphic rocks.metamorphic rocks (in)...crystals showing planar surfaces-namely, magnetite, garnet, epidote, mica, calcite, quartz, and feldspar. Minerals that have a tendency to form large single crystals (e.g., garnet) are termed porphyroblasts
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.
Do intrusive rocks have fine grains small crystals or large crystals?
No, because intrusive rocks form underneath the earth and cool very slowly which causes larger minerals and extrusive rocks form above the ground which cool very rapidly which causes very small minerals. so i hope you get it. Now I'm done.
How much are purple crystals worth?
Depends on the particular purplish crystal. Amethyst is not too expensive but other purplish crystals expensive. So it depends.
What is the simplified pattern that illustrates the order in which minerals crystallize from cooling magma?
when magma cools fast you get smaller crystals when it cools slow you get large crystals its very simple
Are igneous rocks formed from smalll minerals?
Not necessarily. Intrusive igneous rocks, especially pegmatites, can have large crystals.
What is the name of igneous rocks that have large crystals and small crystals?
Large Crystals = Intrusive Small Crystals = Extrusive The name relates to where the minerals were cooled (at at what rate). In the case of intrusive igneous, the rocks were formed above Earth's surface and were thus cooled quickly and the minerals had little time to become defined. Extrusive rocks, therefore, were formed within the Earth's mantle and had a much longer time before being gathered to cool (as they slowly rose to the top).
What is an intrusive (plutonic) rock?
The mineral crystals within them are large enough to see without a microscope.
What process is required for minerals to crystallize from magma?
The process is cooling. When magma cools slowly, large well-define crystals form.
Does melted rock that cools quickly result in igneous rock with large mineral crystals?
No, melted rock that cools quickly result in igneous rock with large minerals because large crystals take time to form and the rocks that usually have them are the ones that were formed inside the earth.
Are large crystals found in diorite?
diorite crystals are large and andesite crystals are small
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 does granite form from?
In the volcano/magma chamber, different minerals that make up granite, (feldspar, quartz, etc.) mix to form grainy, large crystals of the different minerals. That is how granite is formed.
Why do some minerals have crystals and some do not?
A true mineral will have a crystalline structure. Whether or not it's large enough to see with the naked eye, it's still there.
