We report the interplane resistivity, c , at high magnetic fields B, with different orientations together with structural and magnetic properties of bilayered Ca 3 Ru 2 O 7 , a Mott-like system with a gap of 0.1 eV. A wide array of conventionally unanticipated phenomena revealed in this work includes ͑1͒ a collapse of the c-axis lattice parameter at a metal-nonmetal transition, ͑2͒ quantum oscillations in c in the gapped, nonmetallic state for the Bʈc axis, ͑3͒ interplane tunneling

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... ivity for the Bʈa or b axis, and yet conspicuously different anisotropies of the colossal magnetoresistivity and magnetization, and ͑4͒ a non-Fermi-liquid behavior in a metallic state fully recovered in high magnetic fields. The implications of the coexistence of these conflicting phenomena are discussed.