This sapphire displays rutile in its crystal structure, an indication that it completely natural and has not been heat treated. It does display much more flash and sparkle than the video indicates. Virtually colorless, with the exception of one yellow spot on the girdle. From 20 year old stock, we recently had this sapphire faceted in Montana. This sapphire is for someone that is looking for an unheated, colorless Montana sapphire.