Answer:
yes because when metal is melted and hardened ageing it has a bunch of electrons inside that are moving to make it a magnet
 
        
             
        
        
        
Lol, take it from a dude whose main username is White Shadow, and loves riddles
The answer is Shadow
It only appears where there is light, but if light has direct contact with it, such as a flashlight beam, it'll fade.