This paper presents a metaphysical argument against physicalism based on the distinction between intrinsic and extrinsic properties. It argues that the physical, as physicalism must understand it, consists entirely of extrinsic properties, whereas consciousness involves at least some intrinsic properties. It concludes that consciousness has non-physical properties and that physicalism is false. The paper then defends its premises against current physicalist thinking. As much as possible, it offers metaphysical arguments about physical and conscious properties rather than epistemological arguments about our physical and phenomenal concepts.