John  Steele
John Steele answered
Igneous rocks
  • make useful road building materials because they are so hard.
  • Sheets of igneous rock can be cut and polished and used inside buildings
  • gravestones.
Different types have different uses
  • Granite
    • Used for long lasting monuments
    • trim and decoration on buildings
    • outdoor stairs
    • landscaping walls
    • counter tops … Read more