Moon rock sample. Lunar sample 15529 collected from the surface of the Moon by the Apollo 15 mission (26th July to 7th August 1971). The symbol at lower right shows that this is the north-facing side of the rock. This specimen was found about 60 metres northeast of the rim of Hadley Rille and is a very vesicular (hole-filled) mare basalt rock. The Apollo moon landings returned 2,415 samples and over 380 kilograms of moon rock. Moon rocks aid studies of conditions in the early solar system when the Moon and Earth were forming.