In these two image taken by the MastCam (top) and ChemCam (bottom) aboard NASA's Curiosity Mars rover you can see an iron-nickel meteorite about the size of a golf ball. The grid of shiny points visible on the object resulted from laser zapping by Curiosity's Chemistry and Camera (ChemCam) instrument. It has informally been named "Egg Rock," for a site in Maine.
"Egg Rock" isn't the first iron-nickel meteorite found on Mars, but it was the first one to be examined with a laser-firing spectrometer.
The colors of the images have been white-balanced in a way so the appear as if viewded under daytime lighting conditions on Earth. This makes is easier for scientists to compare it to other samples found on Earth.
More information here:
http://photojournal.jpl.nasa.gov/catalog/PIA21134
http://photojournal.jpl.nasa.gov/catalog/PIA21133
More on Curiosity:
https://en.wikipedia.org/wiki/Curiosity_(rover)
https://www.nasa.gov/mission_pages/msl/index.html
Image credits: Top: PIA21134: Curiosity Rover Finds and Examines a Meteorite on Mars NASA/JPL-Caltech/MSSS Bottom: PIA21133: Iron-Nickel Meteorite Zapped by Mars Rover's Laser NASA/JPL-Caltech/LANL/CNES/IRAP/LPGNantes/CNRS/IAS/MSSS
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