Here's a look at the new $1 chip from the Fontainebleau Casino in Las Vegas.
These are provided by the same manufacturer that Parkwest uses in their California poker rooms (Parkwest Casino Cordova & Parkwest Casino Lotus). The dark center disk is a security measure which can be read by sensors below the table on in the cage. It makes for an ugly chip, but I guess the casino seems to think it's worth it.
