Arenophile

Sand from Pismo Beach, California. Components are primarily quartz, chert, igneous rock and shell fragments. Scale bar is 1.0 mm.

Sand from Kalalau Beach, Hawaii.jpg(Field width = 5.5 mm) We see a few grains of olivine, which is the green sand of some beaches of Hawaii.

Star sand, sand all arenophiles want in their collection (Field width = 5.22 mm).

An arenophile is one who collects sand samples, the interest of the hobby lying in the variety of texture, colour, mineralogy and location.

The International Sand Collector's Society fosters contact for tips and sample swapping among collectors worldwide.

This hobby may include sand deposited on coastlines throughout the world. Some collectors may trade sands with fellow arenophiles. The rarest sands are found at the sites Pitcairn's Island and Easter Island. Some collectors have included sand from rivers and mineral deposits if they meet the criteria according to diameter and physical properties, ensuring that the samples have met proper sand definition. Only three places on earth have green sand; recently a supply has been found in Brazil.

Papakolea Beach (also known as Green Sand Beach, Mahana Beach and, erroneously, Puʻu Mahana) is a green sand beach located at South Point, in the Kaʻu district of the island of Hawaiʻi. One of only two green sand beaches in the world, the other being in Guam,[1] the beach gets distinctive coloring from olivine crystals found in a nearby cinder cone.

References

References: National Geographic April 27 1985 "Sand, a vanishing resource" and The Colliers encyclopedia volume R-T, subheading "sand".