http://photojournal.jpl.nasa.gov/catalog/PIA16618

Target Name: Mars Is a satellite of: Sol (our sun) Mission: Mars Science Laboratory (MSL) Spacecraft: Curiosity Instrument: MARDI Product Size: 615 x 458 pixels (width x height) Produced By: Malin Space Science Systems Full-Res TIFF: PIA16618.tif (845.5 kB) Full-Res JPEG: PIA16618.jpg (62.47 kB) Click on the image above to download a moderately sized image in JPEG format (possibly reduced in size from original) Original Caption Released with Image:

Annotated Image Click on the image for larger version This image from NASA's Curiosity rover shows the great diversity of grains found on the surface of a Martian rock. The rock, called "Gillespie Lake," was imaged by Curiosity's Mars Hand Lens Imager on Dec. 19, 2012, the 132nd sol, or Martian day, of operations.

The grains highlighted in the annotated version of this image are about 1 to 2 millimeters (0.04 to 0.08 inches) long and the full frame is about 3 to 5 centimeters (1 to 2 inches) across. Some grains look similar to clear crystal in appearance while others are darker and duller in appearance.

Image Credit: NASA/JPL-Caltech/MSSS

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