Kimberlite is a type of volcanic rock that is known for containing diamonds. It forms deep within the Earth's mantle and is brought to the surface through explosive volcanic eruptions. The rock is typically blue-green or gray in color and can contain various minerals, including olivine and garnet. This rock is significant in the mining industry because it is the primary source of natural diamonds. When kimberlite pipes are discovered, they are often explored for their potential to yield valuable gemstones. The study of kimberlite also helps geologists understand the conditions deep within the Earth.