An Extrusive Igneous Rock on the other hand, is a type of Igneous Rock that cools immediately on Earth's Surface. Technically, it is not magma but lava that it is cooled from as it is no longer beneath Earth's crust. The fast-cooling process does not allow for crystals to form and gives the Igneous rock a cool, shiny look. We unfortunately are not able to see the crystals with the naked eye as the formation of them are super tiny and some rocks may even have no formation of crystals!

Rocks formed by many small rock fragments that are transported and deposited by fluids such as water and bed flows. sandstone

Organic Sedimentary Rocks-

Rocks formed from parts of remains of plants, animals, shells, or even bones.

Chemical Sedimentary Rocks-

Rocks formed by when sediments dissolve in water then evaporate that water. As a result, these rocks form layers, called evaporites.

In similarity, the three kinds of rocks share the fact that they are all formed by many pieces of materials and accumulate in layers over time.

However, they all have differences by how they are formed. Some, like chemical rocks, are only formed if water is evaporated. They also don't contain the same materials as some like organic rocks, that contain the remains of animals, plants, and bones.

Although they have quite a few differences, these three kinds of Sedimentary Rocks are all unique and cool!

These are rocks that have formed bands of minerals due to immense pressure. These minerals form lines and create a parallel-like design on the rocks.

Non-Foliated Metamorphic Rocks-

These are rocks that have no formation of bands. They have no preferential alignment and appear to look crystalized!

https://untamedscience.com/blog/rock-types/.

https://www.zmescience.com/feature-post/natural-sciences/geology-and-paleontology/rocks-and-minerals/types-of-rock/.

https://www.learner.org/series/interactive-rock-cycle.