Black sand from a beach in Maui, Hawaii. 
<ul><li>Photograph by <a rel="nofollow" class="external autonumber" href="http://markwilson.voices.wooster.edu/">[1]</a> (Department of Geology, The College of Wooster).</li></ul>
<a href="//commons.wikimedia.org/wiki/User:Wilson44691" title="User:Wilson44691">Wilson44691</a>
<span class="int-own-work" lang="en">Own work</span>