Of the 20,000 or so meteorites that have been discovered on Earth, only 15 have been identified as originating from the planet Mars. These rare meteorites created a stir throughout the world when NASA announced in August 1996 that evidence of microfossils may be present in one of these Mars meteorites.
Some of these photos are of Mars meteorites are from Mr. Ron Baalke's own personal collection. Mr. Baalke has eight different Mars meteorites in his collection, and it is one of the few private collections in the world that includes a meteorite from each of the three Mars meteorite subgroups (SNC): shergottite, nakhlite, and the extremely rare chassignite.
More information can be found at: http://www.jpl.nasa.gov/snc/