Identification of a very strange SMD component
Hmm, my best guess is, that this is a some base material (white) with a conductive ink (black) drawn on top of it. I also used the fact, that the black part covers the soldering on both ends (to ensure connection).
If this is true, the resistance between the two pads should be less than 1 Ohm. Can you verify this with an ohmmeter?