Ancient Ring Found On Mars?

Interesting artifact found by the Mars Curiosity Rover and was snapped by the left navigation camera, which looks very similar to a piece of  jewelry, a ring.

The artifact is roughly the size of a mans ring on Earth so its not just similar in its overall shape but in scale also.

I have gently enhanced the image by adding color, original image is black and white, and adjusted the brightness and contrast, other than that no other enhancement has been processed.

As you can see in the image comparison this could possibly be an ancient ring, a relic from a past civilization on Mars, which again proves that the red planet did indeed have intelligent life on it at some point in its history.

This is not the first ring I have found either, I found a similar piece of jewelry a few years back, check out the video below.

Raw Image Here