Quote Originally Posted by rdanhenry View Post
Sounds like you're talking about an eggtooth (https://en.wikipedia.org/wiki/Egg_tooth).
Oh ! Thanks a bunch rdanhenry ! I'm constantly amazed by how great a toolbox English is. The French version of the article calls it a "diamond" which makes absolutely no sense unless you plan on robbing a museum with glass casing for the king's jewels.