Block Island - Spyder3D World
Composition measurements by NASA’s Mars Exploration Rover Opportunity confirm that this rock on the Martian surface is an iron-nickel meteorite. Researchers have informally named the rock “Block Island.” With a width of about two-thirds of a meter (2 feet), it is the largest meteorite yet found on Mars.
Relevant Mission: Mars Exploration Rover Opportunity
Date Added to NASA Website: August 8, 2014