Eosphorite is a brown (occasionally pink) manganese hydrous phosphate mineral with chemical formula: MnAl(PO4)(OH)2·H2O.

[4] Eosphorite forms a series with childrenite, the iron rich member, with divalent iron replacing most of the manganese in the crystal lattice.

Its name is derived from the Greek έωσφορος for "dawn-bearing," because of its pink color.

[3] It occurs worldwide typically as a secondary mineral in phosphate rich granitic pegmatites in association with rhodochrosite, lithiophilite, triphylite, triploidite, dickinsonite, albite, cookeite, apatite, beryllonite, hydroxyl-herderite, and tourmaline.

[4] An attractive combination of eosphorite and rose quartz occurs at Taquaral, Minas Gerais, Brazil.