Woah, I never thought this would actually come true, but it seems like it will be in the next few years or so. An invisibility cloak made from Calcite crystals. It would be awesome to get my hands on one of these things. Read the the article from the link below for more info!
http://content.usatoday.com/communities/sciencefair/post/2011/02/invisibility-cloak-calcite/1?csp=34
