The Apollo 15 sample 15415, better known as the <i>Genesis Rock</i>.<br>This is figure 6-8 of the <i>Apollo 15 Preliminary Science Report</i> (NASA SP-289, 1972), which has the following caption:<br>Anorthosite (sample 15415) found as a large clast in breccia at the rim of Spur Crater. The darker part of the sample is a dust coating on a portion of the surface embedded in the breccia matrix.
NASA
1971
<a rel="nofollow" class="external text" href="http://www.hq.nasa.gov/alsj/a15/ap15-S71-42951.jpg">S71-42951</a>