Because Gadolinium is in screens that add the color to the screen.
How do you know ?
Are you here Gadolinium?
He probably doesn't want to come out , lets go to my house and talk about how I am in the money currency here in the USA.
Hey , I am part of pennies too though. I am also in wires which are used to make televisions .
I am worth more than you though , lets take this conversation to my house.
They finally left, Copper was right about me but I am the most beautiful looking element there is , personally. I am a very rare ductile earth metal and I am going to keep it like that and them never discover me muahaha *cough cough* . I should go now !