Lollingite gives its name to a group of minerals of which the mineral lollingite is one of the more common members. All members of the group have lollingite's basic structure. They are all orthorhombic in symmetry and are very uncommon to rare in occurrence. Some classification schemes place Lollingite Group members in the Marcasite Group . Luster is metallic.
Crystals are opaque.
Crystal Habits include prismatic to stubby crystals with a chisel-like domal termination. Elongated wedge shaped crystals are seen when the domal termination becomes dominant. Also compact, massive and disseminated in veins fillings. Twins are seen as star shaped trillings. Streak is a gray black.