I decided not to make a coif.  The decorations would have been sewn framing the face.  Instead, I decided to add them to the crescent.  It is really not authentic, but wearing 3 items on the head was a bit too much for me.

I found some gold ribbon 1-1/2" wide and carefully  pleated it manually by machine.  I couldn't use my pleater, the ribbon was too fragile.  In my stash of antique jewelry, I found this gold necklace with a string of pearl attached.  Perfect!  It was also the correct length.  It was handstitched at the lower edge of the crescent  above the pleated ribbon.