👉 Oolite is a mineral that is primarily found in the Earth's crust and is classified as an igneous rock. It is composed of quartz, feldspar, and mica, and it has a greenish-blue color. Oolites are also known for their ability to absorb water, which makes them useful in many applications such as plumbing and irrigation. Oolite is named after the English mineral chemist John Ool (1802-1874), who