What do they use for the iPhone glass paint?

I attached a photo below. I want to buy some of whatever makes that mirror Gold. Is it paint or what is it? Do you know what this thing is called. Not the case. The paint or whatever. The mirror gold.

I need to paint glass in that color. What do they use for the iPhone glass paint

The way plastics are given a mirror like finish is by evaporating pure metal onto its surface in a vacuum. It is not a paint. The difference in color tints is a property of the metal itself. White metals result in a silvery mirror. Gold results in the yellowed mirror. Other tinges are possible. Metal evaporate is the reason MiniDV video tape has a silver sheen instead of a dull brown characteristic of oxide metal used on old style audio tapes.

the way glass mirrors are made is similar, an ultra thin coat of metal is applied directly to the glass. It is not paint. That coating is usually painted over to insure it is opaque to the back side otherwise the coating is so thin you could see through it. A 2way mirror is just a regular mirror that has not been given that extra coat of paint. 3M corp used to make solar glass which you often see on office buildings that gives the windows a mirror like appearance when looked at from the outside. Looking out from the inside they look like normal window, or sometimes darker like wearing sun glasses. That property is molded into the glass, it is not a surface coating. That also is available in a gold color.