Watch this video about the most expensive television in history on HowStuffWorks. Featuring a whopping 225 carats, a one-of-a-kind diamond-encrusted TV was shown for the first time at this year's 2007 Consumer Electronics Show. The Ambilight 42-inch LCD HDTV from Philips has 2,250 diamonds set into a graceful, stylized floral pattern around the edges of the TV. See how HDTVs work in this video from Medialink.