Heart of Aghast Brooch is a conversation piece if there ever was one. THE perfect gift for a cardiothoracic surgeon or someone that needs a little something to help break the ice.  Yes, the tiny chef's knife is removeable from the anatomical heart chassis. The tiny chef's knife is attached to a silver plated chain that's attached to the heart chassis so if you're concerned about losing the knife, fahgettaboudit! Heart of Aghast Brooch is cut from various acrylics, contains silver plated chain and a secure pinback.