Hornstein

Hornstein may refer to:


 * Hornstein (rock), a silicate-rich chemical sediment and one of the siliceous rocks
 * Hornstein (surname)
 * Hornstein, Austria, Burgenland
 * 6712 Hornstein (1990 DS1), a Main-belt Asteroid (f. 1990)
 * Horenstein (disambiguation)
 * von Hornstein, name of a family of imperial knights in the south of Germany, near Riedlingen