Only a few years ago, it was easy for crooks to sell items they had stolen – silverware, jewelry, firearms, what have you. They just drove to a pawnshop located some distance from where the crime had occurred and sold what they had stolen. The situation was bad for everyone…All that is now changing, thanks to new online databases of stolen goods

We’ve already written about pink gold, rose gold, white gold, and even green gold on the Specialty Metals blog. (See related posts below.) We thought we’d seen just about every color, then we found an article entitled “What Can Make a Piece of Gold Turn Blue?” that Esther Inglis-Arkell wrote for io9.com.