"Egg Rock" is a smooth, shiny nickel-iron meteorite found sitting on the surface of Mars on Curiosity's Sol 1505, or 30-Oct-2016. It is described the next day in Arizona State University's Red Planet Report website: [Curiosity: Egg Rock, a small meteorite][1] Did Curiosity's software flag it as potentially interesting (e.g. "hey, what's that?) or was it noticed/spotted first by researchers, who then directed Curiosity to take a closer look? See also: - Debora Bird in Earthsky.org: [**Curiosity Finds** Small Meteorite on Mars][2] - Gizmodo: [**Curiosity Just Found** A Freaky Metal Meteorite On Mars][3] ---- Images from [EarthSky][2], credit NASA/JPL/[ASU](http://redplanet.asu.edu/?p=20977), captions "October 30, 2016 image via Curiosity rover on Mars" (click for larger size): [!["Egg Rock" meteorite on Mars][7]][4] [!["Egg Rock" meteorite on Mars][8]][5] [!["Egg Rock" meteorite on Mars][9]][6] [1]: http://redplanet.asu.edu/?p=20977 [2]: http://earthsky.org/space/curiosity-meteorite-mars-october-30-2016 [3]: https://www.gizmodo.com.au/2016/11/curiosity-just-found-a-freaky-metal-meteorite-on-mars/ [4]: https://i.sstatic.net/7Nuup.jpg [5]: https://i.sstatic.net/QshE4.jpg [6]: https://i.sstatic.net/gZS9p.png [7]: https://i.sstatic.net/7Nuupm.jpg [8]: https://i.sstatic.net/QshE4m.jpg [9]: https://i.sstatic.net/gZS9pm.png