Apart from the major terrestrial magnetic minerals discussed in Chapters 5–13, many other phases are important in mineral magnetism because they either record magnetizations at ambient or low temperatures. This chapter is devoted to ‘other’ such phases. Those considered include some that are ferrimagnetic at room temperature but have not been detected widely or are emerging as important, including ε-Fe2O3, feroxyhyte, and smythite. Cr-, Mg-, Mn-, and Ni-ferrite oxide spinels can be ferrimagnetic in some compositional ranges. Some terrestrially rare metallic ferromagnets are discussed, including awaruite, wairauite, Co, α-Fe, and Ni. Other phases may be ferrimagnetic but have unknown or debated magnetic structures, including cobaltite and ferrihydrite. Yet other phases are paramagnetic at room temperature but are antiferromagnetic at low temperatures, including akaganeite, lepidocrocite, rhodochrosite, siderite, and vivianite, while others are paramagnetic at all measured temperatures, such as ankerite. Knowledge of the magnetic properties of 16 magnetic phases plus four metal ferrite mineral families is summarized in this chapter.