Often asked, what the difference in colouring an iPhone 4 and an iPhone 5? Well, we are. Here is the answer: glass parts are coloured with an electro plating on the rear side, the inside, of the glass so that the colour never scratches or fades – ever. Aluminum parts, such as the mid frame, or bezel, of an iPhone4 or iPhone4s, or the rear housing of the iPhone5, are anodized colour. We can also gold plate, silver plate, platinum plate, or rose gold plate any of the aluminum parts in these devices.