Igneous Rocks: (Photo 1)

Igneous rocks are defined as types of rocks that are formed when molten rock (rock liquefied by intense heat and pressure) cools to a solid state.

Metamorphic rock: (Photo 2)

Metamorphic Rocks form when one rock changes due to heat, temperature, and pressure and transforms into another rock. The process is called ‘metamorphism,’ which simply denotes change from one thing to another.

Sedimentary Rock: (Photo 3)

The sedimentary rocks are formed by the deposition and subsequent cementation of that material within bodies of water and at the surface of the earth. The process that causes various organic materials and minerals to settle in a place is termed as sedimentation.

Basalt: (Photo 4)

Basalt is a hard, black volcanic rock. Basalt is the most common rock type in the Earth's crust. Depending on how it is erupted, basalt can be hard and massive or crumbly and full of bubbles.

Marble: (Photo 5)

When limestone, a sedimentary rock, gets buried deep in the earth for millions of years, the heat and pressure can change it into a metamorphic rock called marble. Marble is strong and can be polished to a beautiful luster. It is widely used for buildings and statues. As you can see from the picture, marble has a very sparkly luster. It occurs in many different colors such as white, pink, gray, red, yellow or black.