Before revision: Occurrence Vanadinite Vanadium is the 19th most abundant element in the Earth's crust; metallic vanadium is rare in nature (known as native vanadium), having been found among fumaroles of the Colima Volcano, but vanadium compounds occur naturally in about 65 different minerals.
After revision: Occurrence Vanadinite Metallic vanadium is rare in nature (known as native vanadium), having been found among fumaroles of the Colima Volcano, but vanadium compounds occur naturally in about 65 different minerals.