pixel_player76140783 you have overlooked something. The jadeite material is there. I know, because I did it already.
check also that you have everything you need to make the Key. You need one piece of jade AND 200 ancient scrap metal. Maybe the jade is in your backpack but you lack the metal? Just a thought.
But if you have plenty of metal, and no jade, you will need to go to each location. Check the maps for where the jade is supposed to be.