In Jessica Barnes’ palm is an ancient, coin-sized mosaic of glass, minerals and rocks as thick as a strand of wool fiber. It is a slice of Martian meteorite, known as Northwest Africa 7034 or Black Beauty, that was formed when a huge impact cemented together various pieces of Martian crust.
Click here for original story, A Martian mash up: Meteorites tell story of Mars’ water history
Source: Phys.org