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
This disambiguation page lists articles associated with the title Hornstein.
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