An icon from icon theme <a href="//commons.wikimedia.org/wiki/Category:Crystal_icons" title="Category:Crystal icons">Crystal</a>
<a href="https://en.wikipedia.org/wiki/Everaldo_Coelho" class="extiw" title="w:Everaldo Coelho">Everaldo Coelho</a> (<a rel="nofollow" class="external text" href="http://www.yellowicon.com">YellowIcon</a>);
<a rel="nofollow" class="external text" href="https://store.kde.org/member/696/">All Crystal icons were posted by the author as LGPL on kde-look</a>, the SVG version in various <a rel="nofollow" class="external text" href="https://download.kde.org/Attic/4.1.4/src/">KDE packages</a>;