One of the most popular tag sale items was an amazing antique mirror that sold within the first hour. We all knew the smoky, silvery effect on the mirror had a name but none of us could think of it. We even tried to Google it with no luck. Yesterday I was looking through Lara Spencer's I Brake for Yard Sales book and there it was on page 84. The oxidation of the mercury on the back of old glass is called Foxing. So if you come across one of these Foxy Ladies, snatch her up. They immediately add history and sophistication to your space.