The NWA 7533 is a unique martian meteorite, the first meteorite to originate from the Martian crust
Origin and age of the earliest Martian crust from meteorite NWA 7533,
M. Humayun, A. Nemchin, B. Zanda, R. H. Hewins, M. Grange, A. Kennedy, J.-P. Lorand, C. Göpel, C. Fieni, S. Pont & D. Deldicque, Nature, 20 novembre 2013.
http://dx.doi.org/10.1038/nature12764
COMPOSITION OF NORTHWEST AFRICA 7533: IMPLICATIONS FOR THE ORIGIN OF MARTIAN SOILS AND CRUST. M. Humayun1, B. Zanda2, R. H. Hewins2,3, and C. Göpel4: http://www.lpi.usra.edu/meetings/lpsc2013/pdf/1429.pdf
Meteoritical bulletin about NWA 7533:
http://www.lpi.usra.edu/meteor/metbull.php?code=56550
http://www.lpi.usra.edu/meetings/lpsc2013/pdf/sess302.pdf
NORTHWEST AFRICA 7533, AN IMPACT BRECCIA FROM MARS. Roger H. Hewins1,2, Brigitte Zanda1,2,
Munir Humayun3, Sylvain Pont1, Christine Fieni1 and Damien Deldicque4.
http://www.lpi.usra.edu/meetings/lpsc2013/pdf/2385.pdf