<a href="//commons.wikimedia.org/wiki/NASA" title="NASA">NASA</a> lab photo of Lunar Sample 61016, better known as <a href="https://en.wikipedia.org/wiki/Big_Muley" class="extiw" title="en:Big Muley">Big Muley</a>, the largest rock returned from the Moon during the Apollo program. This rock, a <a href="https://en.wikipedia.org/wiki/breccia" class="extiw" title="w:breccia">breccia</a>, was discovered and collected on <a href="//commons.wikimedia.org/wiki/Apollo_16" title="Apollo 16">Apollo 16</a>.
National Aeronautics and Space Administration
<a rel="nofollow" class="external text" href="http://www.lpi.usra.edu/lunar/samples/atlas/lab_view/?mission=Apollo%2016&amp;sample=61016&amp;side=t">Lunar Sample 61016</a>