Stone from near Sir Ernest Shackelton's grave in Grytviken on South Georgia on Tom Crean's memorial in his native Annascaul.
<a href="//commons.wikimedia.org/wiki/User:Mucklagh" title="User:Mucklagh">Mucklagh</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>