Weekend Contest: What Curiosity found on Mars

Okay, it’s weekend – time for some fun! (And if you happen to be on the East Coast of the USA, some possibly snowed-in fun!)

Mystery metal on Mars

Curiosity spotted an interesting looking piece of metal on Mars. What is it? 

We’d like YOU to tell us. You have until Monday morning 10:00, GMT+1 to come up with the answer. 
How to enter
3D model the Martian Mystery, upload it to your gallery, tag it with ‘Weekend Contest: Mars’ and post the link and picture on our forum here.
Who wins?
You decide! Visit the model that you like most, and add it to your favorites. The model with the most votes wins.
What’s the prize?
Eternal fame! Kudos from the Shapeways team! Riches! Okay, well, the winner will get a $25 gift certificate. 
That’s all? Yep, grab a drink, goof around in your favorite modeling app this weekend and have fun!
Bart
PS: Curiosity’s Twitter feed is awesome.