This cabinetry houses DVDs and CDs.  The boxes are ebonized alder.  The upper doors are Sepele Pomele wood, the lower doors are sliding metal with 6 contrasting patina finishes.  More pictures below.

 

This shot shows the Sepele Pomele doors.  The center one having a patinaed metal top half.

Here is a close up of one of the patina finishes.