Chassigny is a martian meteorite. History: In 1815, the October 3, in the small city of Chassigny (Haute Marne, France) a stone was observed to fall from the sky after loud sonic booms were heard. From the meteorite originally weighed about 4,000 grams (~9 pounds), there is only today about 570 grams preserved of the meteorite mainly in the MNHN of Paris. Chassigny is a martian meteorite distinctly different from the shergottites and nakhlites the other SNC's. It has been assigned its own signature subgroup, chassignite.