How do you tell the difference between a hard-boiled egg and one that is raw? By what they are served in, of course!*
Some may want to live on the edge and crack a dozen open to find out if they are cooked or not, but others may wish to consider the Kikkerland Ceramic Egg Rack
* Okay, okay. The secret is to give them a spin. The cooked egg will stop spinning while the raw one will start again when released–without being egged on to.