Simonellite

Simonellite (1,1-dimethyl-1,2,3,4-tetrahydro-7-isopropyl phenanthrene) is a polycyclic aromatic hydrocarbon with a chemical formula C19H24. It is similar to retene.

Simonellite occurs naturally as an organic mineral. It is named after its discoverer, Vittorio Simonelli, an Italian geologist. It forms colorless to white orthorhombic crystals. It occurs in Fognano, Tuscany, Italy.

Simonellite is derived from diterpenes present in conifer resins.

Simoenllite, together with cadalene, retene and ip-iHMN, is a biomarker of higher plants, which makes it useful for paleobotanic analysis of rock sediments.