doubt

Greetings everyone, Upon using my new Jet Black 7 Plus I have come to notice these reflections/patterns on its polished bezel. I can only see them under certain lightning. The attached photo was taken with my desk lamp on, but if I use the phone near a window the reflections are not visible...

Hi all, I already searched the forum, but could not find any reply that could satisfy my doubts. I currently own a Late 2011 13" MacBook Pro with a 2.4 GHz i5 and 4 GB 1333 MHz of RAM. I feel that is finally time to update this machine, but looking at the prices for the 13" that are available...