Chromite: The only mineral ore of chromium metal
An ore of chromium, the metal used in stainless steel, nichrome, and chrome plating. Article by: Hobart M. King, PhD, RPG. Chromite: Chromite from the Transvaal area of South Africa. Specimen is approximately 4 inches (10 centimeters) across. What is Chromite? Chromite is an oxide mineral composed of chromium, iron, and oxygen (FeCr 2 O 4). It is dark gray to black .