These are the metallic black and silver model, and the leather - based rose gold model. (mostafasafavi.com)
The contrast between the shiny edges and matte color is most pronounced on the black model (which I have here), but is noticeable on the white and gold models as well. (androidcentral.com)
It describes my empirical gold model which is similar to the above described silver model. (goldsilverworlds.com)