This is posted at the bottom of the iPhone 7 website about the Jet Black version. Just thought some people would like to know about it if they are considering getting that color:
"2. The high-gloss finish of the Jet Black iPhone 7 is achieved through a precision nine-step anodization and polishing process. Its surface is equally as hard as other anodized Apple products; however, its high shine may show fine micro-abrasions with use. If you are concerned about this, we suggest you use one of the many cases available to protect your iPhone."
Just a heads up!

"2. The high-gloss finish of the Jet Black iPhone 7 is achieved through a precision nine-step anodization and polishing process. Its surface is equally as hard as other anodized Apple products; however, its high shine may show fine micro-abrasions with use. If you are concerned about this, we suggest you use one of the many cases available to protect your iPhone."
Just a heads up!
