You are looking at a gold Mario pendant covered in 14.5 carats of round-cut diamonds, somehow in the appropriate Mario colors. This is, apparently, a real thing that somebody thought it would be a good idea to make, and then to let other people know that they made. According to the seller, the retail value of this Mario bauble is $11857.00, but you can Buy It Now for just $7,000.
This represents a missed opportunity for jewelryking, who we assume to be the creator of the pendant. Charles Hamilton is a rapper and thus a member of the only profession that could actually get away with wearing this monstrosity -- but he's a Sonic fan.
Update: commenter Rich points out something that we should probably say explicitly just in case: the chances of this thing being made of real gold and/or diamonds are very, very low. But that shouldn't matter because you were not going to buy this anyway. [Via GameSniped]