Hibonite is a mineral with the chemical formula (Ca,Ce)(Al,Ti,Mg) 12O 19, occurring in various colours, with a hardness of 7.5–8.0 and a hexagonal crystal structure. It is rare, but is found in high-grade metamorphic rocks. Some presolar grains consist of hibonite. Hibonite also is a common mineral in the Ca-Al-rich inclusions. Hibonite is closely related to hibonite-Fe (IMA 2009-027, (Fe,Mg)Al 12O 19)) an alteration mineral from the Allende meteorite.
A very rare gem, hibonite was discovered in 1953 in Madagascar by Paul Hibon, a French prospector.