Porphyrite of any composition, granite, gabbro, diorite. Most intrusive igneous rocks have crystals large enough to see with the naked eye. Another term used to define an igneous rock with large crystals is coarse-grained.
A coarse grained texture, referred to as a phaneritic texture, will be the resultant igneous rock texture. The slower the magma cools the more time minerals have to crystallize and thus grow bigger.
Igneous rocks usually contain the most crystals. The longer it takes the magma to cool, the larger the crystals. According to the Earth Science Reference Tables, pegmatite contains the largest crystals.
A very large number if the rock forming minerals allow the transmission of light if sliced thinly enough. Some others are translucent at larger scale for example quartz and calcite. However in most rocks the size of the clasts or crystals is too small or the presence of gas inclusions or other elements causes them to become coloured, cloudy or otherwise opaque. It is possible that it may be possible to see through a pegmatite (pegmatites are a rare type of very coarsely crystalline intrusive igneous rock) if the crystals are large enough. As such in the vast majority of cases naturally occurring rocks are opaque and can not be seen through.
Batholiths are a massive site of plutonic rock material, such as felsic and intermediary rocks, which is created from cooled magma far within the crust of Earth. The igneous intrusions in batholiths that are around 40 sq. mi. are called stocks.
Igneous Rock molten rock igneous rock is when it cools.
No. Intrusive igneous rocks have large crystals because they cool slowly.
Large crystals are diagnostic of an intrusive igneous rock, as large crystals form as the source magma cools slowly.
Large crystals are typically characteristic of intrusive igneous rocks, which form beneath the Earth's surface from slow cooling of magma. Extrusive igneous rocks cool quickly at or near the Earth's surface, resulting in smaller crystals or glassy textures.
Igneous rock formed in the earths crust is known as intrusive rock. The magma that forms it cools slowly and therefore, creates rock with large crystals. An example of an intrusive igneous rock is granite.
Intrusive or granite.
If a rock has large crystals, it is an intrusive rock. Intrusive rocks form underneath the Earth's surface. Magma cools slowly so it has time to form large crystals. An example is granite, where you can see the crystals with your naked eye. Rocks that have small crystals are extrusive rocks. Extrusive rocks are ones that form from lava (blasted out of a volcano) so they cool very quickly, not allowing large crystals to form. An example is obsidian, where you cannot visibly see the small crystals; it just looks like one black, glassy rock.
Not necessarily. Intrusive igneous rocks, especially pegmatites, can have large crystals.
Igneous rocks can have both small and large crystals, depending on how quickly they cool. If an igneous rock cools slowly beneath the Earth's surface, it can form large crystals, while rapid cooling at the Earth's surface or in an eruption can result in small or no visible crystals.
It depends on the cooling rate of the magma. If the magma cools slowly underground, large crystals can form, creating intrusive igneous rocks. If the magma cools rapidly on the Earth's surface, small crystals or glassy textures can result in extrusive igneous rocks.
Igneous rocks with large crystals are known as intrusive or plutonic rocks. These rocks form underground as magma cools slowly, allowing large crystals to grow. Common examples include granite and diorite.
An igneous rock containing large crystals is most likely a plutonic or intrusive rock. These rocks form from the slow cooling of magma beneath the Earth's surface, allowing time for larger crystals to grow. Examples include granite and diorite.
The rock is called an "Intrusive Igneous Rock." Intrusive rocks have longer cooling times, allowing minerals to grow into larger crystals. Examples include granite, diorite, and gabbro.