Diamond Head

== English == === Etymology === (Hawaiian tuff cone): Named by British sailors in the 19th century, from the calcite crystals on the adjacent beach. === Proper noun === Diamond Head A volcanic tuff cone on the Hawaiian island of Oʻahu. A subsidiary peak of Mount Garibaldi in southwestern British Columbia, Canada. A locality in the Port Macquarie-Hastings council area, north eastern New South Wales, Australia.