Diamond Head in Hawaii. Stock photo by Justin Lam via Unsplash.
Diamond Head is a volcanic tuff cone on the Hawaiian island of Oʻahu and known to Hawaiians as Lēʻahi (pronounced [leːˈʔɐhi]). The Hawaiian name is most likely derived from lae (browridge, promontory) plus ʻahi (tuna) because the shape of the ridgeline resembles the shape of a tuna’s dorsal fin. Its English name was given by British sailors in the 19th century, who named it for the calcite crystals on the adjacent beach.
This article uses material from the Wikipedia article “Diamond Head, Hawaii“, which is released under the Creative Commons Attribution-Share-Alike License 3.0.