Upon the initial unpacking, I thought the dish was cast iron.  Great heft, nice fitting lid, and the sound it made when the lid was fit on to the dish gave me momentary pause about the products material.  The ceramic finish is pretty good (always a couple flaws when dealing with ceramics).  The color, in this case indigo/dark blue, matches the other indigo/dark blue cast iron pieces I have from Staub.  It is a great piece, bakes well, cleans up nicely.  Decently priced, a good purchase.