Hawaii

The soft white sand of Waimanalo Beach is primarily composed of smoothly worn grains of marine organisms including forams and bivalve fragments...

A mixture of dark and white sand grains present a colorful view of the diverse sand at Kaloko-Honokohau beach. Dark red and black porphyritic volcanic grains and varied colored sea urchin spine fragments...

The sand is composed of a mixture of biogenic and volcanic grains. The biogenic marine grains are smoothly rounded as a result of the famous strong winds and waves of Maui...