Graphics3D[{Polygon[{{0.28868, 0.5, -0.5}, {-0.57735, 0, -0.5}, {0.28868, -0.5, -0.5}}], Polygon[{{-0.28868, -0.5, 0.5}, {-0.28868, 0.5, 0.5}, {0.57735, 0, 0.5}}], Polygon[{{0.57735, 0, 0.5}, {-0.28868, 0.5, 0.5}, {0.28868, 0.5, -0.5}}], Polygon[{{-0.28868, 0.5, 0.5}, {-0.28868, -0.5, 0.5}, {-0.57735, 0, -0.5}}], Polygon[{{-0.28868, -0.5, 0.5}, {0.57735, 0, 0.5}, {0.28868, -0.5, -0.5}}], Polygon[{{-0.28868, 0.5, 0.5}, {-0.57735, 0, -0.5}, {0.28868, 0.5, -0.5}}], Polygon[{{-0.28868, -0.5, 0.5}, {0.28868, -0.5, -0.5}, {-0.57735, 0, -0.5}}], Polygon[{{0.57735, 0, 0.5}, {0.28868, 0.5, -0.5}, {0.28868, -0.5, -0.5}}]}, {Boxed -> False, DisplayFunction -> Identity}]