Alien Rock!

This rock appears to be a sedimentary rock, possibly mudstone or argillite with iron staining. Here's a breakdown of the reasoning:
Reasons for the Identification:
* Texture: The rock has a relatively smooth, fine-grained texture, which is characteristic of mudstone or argillite.
* Color: The colors are a mix of gray, brown, and greenish-brown, suggesting the presence of iron oxides or other minerals that commonly stain sedimentary rocks.
* Layering (Possible): There might be subtle layering visible on the surface, which is a common feature in sedimentary rocks.
* Overall Appearance: The rock has a "rocky" feel, but lacks the crystalline structure of many igneous or metamorphic rocks.
Why Mudstone or Argillite?
* Mudstone: Mudstone is a fine-grained sedimentary rock composed of clay-sized particles. It's often gray, brown, or reddish and can have a smooth or slightly grainy feel.
* Argillite: Argillite is a slightly metamorphosed mudstone, meaning it has been subjected to some heat and pressure but not enough to significantly change its mineralogy. It can have a similar appearance to mudstone but might be slightly harder.
Iron Staining:
* The reddish and brownish areas likely indicate the presence of iron oxides, which are common in sedimentary environments and can stain the rock through weathering or groundwater interaction.
Further Confirmation:
* Hardness Test: Mudstone and argillite are relatively soft rocks. You should be able to scratch them with a knife or even a nail.
* Texture Observation: A closer look with a magnifying glass might reveal the fine-grained texture and possible layering.
* Break Test: Breaking a small piece of the rock might reveal a more detailed view of its internal structure and texture.
In conclusion, the rock is most likely a sedimentary rock, potentially mudstone or argillite with iron staining.