The Collaborative International Dictionary of English v.0.48:

Shagreen \Sha*green"\, Shagreened \Sha*greened"\a.
   1. Made or covered with the leather called shagreen. "A
      shagreen case of lancets." --T. Hook.
      [1913 Webster]

   2. (Zool.) Covered with rough scales or points like those on
      shagreen.
      [1913 Webster]