Confused with Lumia 520 shells

[Nasart]

Hi
Well I'm confused with Nokia Lumia 520 shells which I saw some specific colors are matte and some are glossy, so does every color have 2 versions (matte and glossy) or is there some specific colors for the matte version and vice-versa ?
Thx in advance !

 

[switch side method]

To add more confusion there are customs shells you can get on ebay... They are 3rd party so price will be cheaper..some nice designs... Check them out on ebay