PIA16618: Texture of 'Gillespie Lake' Rock
 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 (w x h)
 Produced By:  Malin Space Science Systems
 Full-Res TIFF:  PIA16618.tif (845.5 kB)
 Full-Res JPEG:  PIA16618.jpg (62.47 kB)

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Annotated Image
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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.

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