75015 is a vuggy, coarse-grained (1-2 mm) ophitic ilmenite basalt with pink pyroxene, plagioclase feldspar and ilmenite crystals up to 2 mm in length. A trace of olivine is also present. Silica is the most abundant accessory mineral and is present in the form of tridymite needles (rotation 1) and cristobalite (two crystals in rotation 2).
The sample weighed 1006 grams before analysis and has not been dated.
Further details of this and other Apollo samples are here: http://curator.jsc.nasa.gov/lunar/
Apollo 17, the final manned landing mission, had two objectives: to obtain samples of ancient rocks from the lunar highlands and to look for evidence of younger volcanic activity on the valley floor.
This small Collection contains material deriving from both periods, including igneous rocks around 4.3 billion years old from the lunar highlands as well as younger volcanic samples dating from about 3.6 billion years ago.
Apollo 17 was launched on 7 December 1972.