Hawaii beaches: red, black, white, pink(ish), and green.
Papakōlea Beach, also known as Green Sand Beach or Mahana Beach, is a green sand beach located near South Point, in the Kaʻū district of the island of Hawaiʻi. One of only four green sand beaches in the World, the others being Talofofo Beach, Guam, Punta Cormorant on Floreana Island in the Galapagos Islands, and Hornindalsvatnet, Norway. It gets its distinctive coloring from the mineral olivine, found in the enclosing cinder cone.
The cinder cone is rich in olivine, a silicate mineral containing iron and magnesium, also known as peridot when of gem quality. Olivine is a common mineral component of Hawaiian lavas and one of the first crystals to form as magma cools. Olivine is locally known as “Hawaiian Diamond” and is notably found in Oʻahu’s famous Diamond Head landmark.