hornstone

How to use hornstone in a sentence

• Dark grey porphyritic hornstone, approaching to compact felspar, with imbedded crystals of felspar.

  Narrative of a Survey of the Intertropical and Western Coasts of Australia] [Volume 2 of 2] | Phillip Parker King

• I also picked up a detached mass of argillaceous oxide of iron, and some fragments of striped hornstone.

  Summary Narrative of an Exploratory Expedition to the Sources of the Mississippi River, in 1820 | Henry Rowe Schoolcraft

• About ten miles north of this point, the upper calcareous, or surface rock, embraces nodules of hornstone.

  Summary Narrative of an Exploratory Expedition to the Sources of the Mississippi River, in 1820 | Henry Rowe Schoolcraft

• The occurrence of a hard variety of hornstone, which is not flint, is apparently confined to the compact, fetid variety.

  Summary Narrative of an Exploratory Expedition to the Sources of the Mississippi River, in 1820 | Henry Rowe Schoolcraft

• Among the rubbish of the diggings, fragments of hornstone occur.

  Summary Narrative of an Exploratory Expedition to the Sources of the Mississippi River, in 1820 | Henry Rowe Schoolcraft