New ore to improve tools and armor

A mineral to improve tools and armor that serves to increase their durability. One idea may be to put it as an end ore, to make this dimension useful after killing the dragon. This durability could be seen around the item that has it something like a small graphic (obviously also represented with pixels). This mineral can be white with a magenta gradient and could be given the Unbreaking and Mending enchantments before attaching it to an item. It could be put with a new blacksmith mold. It could be found in another end structure or directly in the end cities. More of these minerals could be added to the anvil to repair its durability.