Diamond Head, Oahu, Hawaii is the name of a volcanic tuff cone on the Hawaiian island of O'ahu. Its English name was given by British sailors in the century, who mistook calcite crystals on the adjacent beach for diamonds. Hawaii is the state.
Top 10 Most Tropical Islands: The Cook Islands is a parliamentary democracy in the South Pacific Ocean in free association with New Zealand. It comprises 15 small islands whose total land area is 240 square kilometres sq mi)