Here's NASA's hi-res original:

http://mars.jpl.nasa.gov/msl-raw-images/msss/00173/mcam/0173...

A better source:

http://www.universetoday.com/99750/another-weird-shiny-thing...

we don't know for sure it is metal, but it looks terribly similar to a number of metal ore veins I've seen here on earth.

Man, that HuffPo Google Hangout video thing was the most asinine things I've seen online in a while.

Huffington Post? Come on now..

1/2 a centimeter in height, natural feature.

Huffington Post Sports "Deceptive" Title

Don't see the comments in the article.