Anisotropic colloids of exotic size, shape, and properties have recently received growing interest as new methods for producing such particles have emerged. Simulations predict that these colloids can exhibit a structural diversity quite different than that of their spherical counterparts. Despite this evidence however, few examples of such complex assemblies have yet to be shown experimentally. Here, we describe the synthesis and ordering of peanut-shaped α-Fe2O3/SiO2 core-shell particles with a long-range attractive potential in 2D. The hematite core is prepared by aging a condensed ferric hydroxide gel under hydrothermal conditions, while a rhodamine-functionalized silica shell is grown onto the particle surface via sol-gel chemistry. An unusual canted antiferromagnetism in the hematite cores gives rise to a magnetic dipole moment oriented perpendicular to each particle's long axis. Characterization of the peanut-shaped colloids and their monolayer structure is conducted via confocal microscopy, electron microscopy, SQUID, and x-ray powder diffraction.