A variety of [Aenigmatite] (q.v.) of very complex composition, TiO₂ = 6-8%.
Anorthic.
G = 3·74. H = 5. Black; opaque.
Island of Pantellaria (formerly Cossyra).
Cyrtolite.
A pseudomorph after zircon, allied to [Alvite] (q.v.).
Tetragonal.
See [Alvite].
Various localities in Scandinavia, and U.S.A.